st2 and 3 support

fixes import

utf8 encoding

fixes for ST3 - thanks @jakemcgraw

Insert snarky comment here.

support for ST2 and ST3

fixes

Merge pull request colinta#20 from gzzz/master

colinta#19

Merge pull request colinta#17 from rlstephenpoole/master

Now replaces all text in current document when nothing is selected

added md5, sha256, sha512 hashing 'encoders'