Gollum now uses some of the .NET 4.5 features (async / await)

Gollum now uses some of the .NET 4.5 features (async / await). Fixed
bugs are now parsed better from the commit message. Fixed some other
issues and improved exception handling.
Some code cleanup and minor fixes.

If getting bug information from bugzilla fails (f.ex. no bug entry),
moving to next fixed bug until succeeds or all bugs have been processed.
Bugzilla authentication errors are shown to user.

Pressing an enter key while any comment is being edited no longer sends
the review.
Fixed #1

Added possibility to update only bug status without posting to review
board (issue #1). Resized also client, somehow did not work in Windows
8, hopefully still works in Windows 7 and older.
Fixed 'Post review' button text in certain cases
Fixed client size and scaling issues

Client did not perform very well in higher dpi environments. Now trying
to do some basic size scaling when resizing based on dpi. If client is
modified in higher dpi mode, client will most likely look odd in lower
dpi systems, so please test if you do so.
Merge pull request #9 from nodia/NET45

Gollum now uses some of the .NET 4.5 features (async / await). Härskisti ite...