Context patterns not matching the same as CLI interface

[cdcrockett]

When using a formatted date string as a context, the Touch interface does not use the same pattern match as the CLI. Example:
@2011-01-11 is matched as a context in the CLI, Todo Touch only recognizes the same context as @2011

[gwadej]

The same problem applies to projects. My +todo.txt project for trying to help with this is not recognized either.

[ginatrapani]

More robust handling of context and project names

Both context and project names only matched "word" characters. Basically
alphanumerics and underscore. There are often times where some internal
punction makes sense. (A project of todo.txt or a context of 2010-01-30)

This changes both expressions to match non-space characters, with the
final character being a word character. I added the last to not include
a potential final '.' or ',' if someone were adding the contexts or
projects by hand.

Closed by 8c82f10, Closed by 8c82f10