Add localization functions and russian localization

[asmfreak]

This PR fixes #335 - It adds gettext localization to all strings that are used in Application output.
Also as a test I've written russian localization. Any other language can be easily added.
This should be tested on py2.x and on Windows.

[coveralls]

Coverage decreased (-1.3%) to 79.804% when pulling 3dc7590 on ASMfreaK:master into de47645 on tomerfiliba:master.

[coveralls]

Coverage increased (+0.06%) to 81.114% when pulling cfb67aa on ASMfreaK:master into de47645 on tomerfiliba:master.

[henryiii]

This looks great. I'll try to get it in in a day or two. Thanks!

[henryiii]

Would you mind changing the % formatting into {name} formatting? That would be more consistent than using both styles, and would be easier for translators to use (for example, if they need to reorder a pair of messages). The fact that Plumbum currently mixes both styles is a historical relic.

[asmfreak]

I like braces formatting, too. Ok.

[coveralls]

Coverage increased (+0.06%) to 81.114% when pulling ef883ce on ASMfreaK:master into de47645 on tomerfiliba:master.

[coveralls]

Coverage increased (+0.06%) to 81.114% when pulling ef883ce on ASMfreaK:master into de47645 on tomerfiliba:master.

[henryiii]

LGTM.

[henryiii]

Thanks!!!

[asmfreak]

Yay~