New run command to use Query directives

[Martin Blais]

Hi,

I just implemented a new "run" command to make use of the Query directive.

Thought it was worth of note.

Here's the changelog:

    Implemented new "run" shell command that allows you to run a named query.

    For example, if an input file has a Query directive like this:

      2016-09-01 query "home" "select account, sum(position) where account ~ 'Home' group by 1"

    And you input this command:

      run home

    The entries will be closed at tue query date (2016-09-01) and the query

    automatically run. If you want to always include all the transactions, set a

    date far into the future.

    This works from the command-line and from the shell, equally. You can also

    run all the queries in an input file, like this:

      run *

    To view the list of available queries, just type the "run" command without

    an argument.

[joshua...@gmail.com]

Great work! Just out of curiosity, what's your release schedule for Pypi?