Merge pull request #180 from Vaskivo/master

Fixed Ghost.capture() when using selectors/regions
- Ghost now can be used with "with" statement, properly cleaning up the resources afterwards
Add __version__

Added __version__ attr to package so that scripts that check local
packages to see if newer versions are available can work.

Almost all Python packages have a version attr, and the vast majority of
them name it "__version__"
Merge pull request #183 from adalq/version

Add __version__
Merge branch 'master' of git://github.com/andreycizov/Ghost.py into andreycizov-master
Merge branch 'andreycizov-master'
bump 0.1b4