UI:  Add name/version to window title

Also, make the 'start stream' button say 'connecting...' when it's
initially trying to connect.
UI:  Replace ico files with png

ico files weren't rendering properly under every circumstance for
whatever reason.
Add ability to move source up/down/etc
libobs:  Prevent adding of null user sources

Not entirely sure how this happened but I *think* that a null source was
somehow being added to the list of user sources for one particular user,
and then I noticed this code does not check to see whether the source is
null or not.
Show commit hash in version string

Also, update to 0.2.2
Log version string on startup
Use OBS_HAVECONFIG_H for version string
Add FLV file output code

This doesn't add FLV file output to the user interface yet, but we'll
get around to that eventually.  This just adds an FLV output type.

Also, removed ftello/fseeko because off_t is a really annoying data
type, and I'd rather have a firm int64_t for large sizes, so I named it
to os_fseeki64 and os_ftelli64 instead, and changed the file size
function to return an int64_t.
Remove output from encoder when output is destroyed.

This fixes an issue reported by valgrind where a destroyed output is
still referenced by the encoder.
Destroy swapchain before removing the window info

This fixes an issue reported by valgrind where cleaning up the
swapchain fails because the window info is destroyed before.
Merge pull request #86 from fryshorts/fixes

Minor fixes for problems reported by valgrind