Update NEWS, documentation, and copyright notices.

Use the click_shell module to implement back the interactive shell,
to be used when the program is called without any explicit command.

The delete and edit commands expect the credential ID to be an
integer, not a string.

Make sure lines are no longer than 79 characters.

Use f-strings instead of str.format wherever possible.

Re-add the --version flag to print the program's version and copyright
notice. Allow -h as an alias for --help.

Use the Click module to build the command-line interface instead of our
own code. This cures a severe case of NIH syndrome.

There's no point in supporting Python 2 anymore.

Use the new helper class Application in the incenp.helpers package.

The incenp.helpers.subcommands.CommandList object now expects to
receive the object returned by ArgumentParser.add_subparsers().

There is no need to support Python 2 anymore.

Add a dependency to my incenp.helpers module and remove the internal
Command and CommandList classes in favor of the versions in that
module.

Ignore files generated by the Eclipse IDE and the PyDev plugin;
add missing copyright notice; apply PyDev style.

Bump version number and update NEWS file.

Also rewrite part of the README to avoid redundancy with the now
available documentation.

Add some explanations about how the cache is working.

When running as a shell, do not exit the shell if a command
raises an application exception. Just display the error message
and return to the prompt, ready to execute the next command.

Add new documentation on how to configure Pebble.

Add a confirmation prompt to the delete command.

If the user specified an invalid ID to the edit or delete
commands, error out instead of crashing.

The README is not enough, Pebble needs a proper manual.

Bump version number, update NEWS and README files.

Remove the refresh subcommand, replace it by a command only
usable from the internal shell.

The value of 'max_age' is expected to be in seconds, but adding a
'm', 'h', or 'd' suffix allows it to be expressed in minutes,
hours, or days respectively.

Allow to override the default max lifetime of the cache (86400 s)
by specifying a custom lifetime with the 'max_age' option in the
configuration file.

If a vault section in the configuration file contains a 'nocache'
option set to any truth value ('yes', 'on', 'true', or '1'), then
Pebble never writes the vault data to its local cache. The data is
only kept in memory and must be downloaded upon each invocation of
the program. Only the vault's UUID is written into the cache.

Replace the ExitCommand class by a simple callback function feature
in the Command base class.

Add the CommandList object to encapsulate managing the available
commands both for the main program and for the shell subcommand.

Gracefully exit the shell upon Ctrl-D.

Use the readline module to provide completion for the available
commands in the shell.

When a wrong command is entered, return to the prompt without
forcefully exiting the program.

Add a command to forcefully refresh the cache.

Add a rudimentary implementation of a 'shell' command.

When decrypting an entry, return a copy of the entry with the
decrypted fields, instead of the original entry.

Handle SIGINT by catching KeyboardInterrupt exception, to
avoid printing a stacktrace upon Ctrl-C.

An entry may not necessarily contain an username (especially if
the email field is used instead).

The Email field had been forgotten in the simplified editor,
add it now.

Rename project to incenp.pebble, bump version number and update
NEWS file.

Let's keep option names simple.

When editing an entry in "simple" (non-JSON) mode, display some
comments for some fields. Those comments use the traditional '#'
marker, making them easy to ignore when parsing the edited file.

Catch decryption errors (which may be caused by an incorrect
passphrase, tampered data, or unexpected SJCL structure) and
print a single error message instead of an exception trace.

When attempting to create or modify an entry, check if the entry
has indeed been modified and do not upload it to the server if
it has not.

Do not force to use the JSON editor to be able to change tags.
Represent tags in the simple editor as ', '-separated values.

By default, show credential in the editor as a simple list of
'Name: value' lines, instead of the original JSON.

The edit and new command accept a --json, -j option to revert
to the original behavior of editing the raw JSON.

In Python 2, calling .format() on a non-Unicode string may lead
to an encoding error if the parameters of the format() call
contain some Unicode strings.

To avoid that, make sure to call format() only on Unicode strings.

incenp-bug-id: 1

Use the README file as setuptools' long description, for later
upload to the Python Package Index.

Also fix a missing word in said README.

Bump version number, add NEWS file, update setup.py and update
all copyright notices.

Provide a little more help when using the -h option on a
subcommand.

Print usage and exit when called without any subcommand.