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Initial refactoring of Main into OS-specific implementations

As part of a general cleanup, I'm moving the startup of each application to its own class -- ie Windows now uses HearthStatsWin instead of Main, Mac OS X now uses HearthStatsOsx instead of Main. There's still more to do, this is just the start.
Further refactoring into environment class
minor refactoring / code review
Merge branch 'gtch-clean-main'
Moved newNotificationQueue to Environment to avoid using reflection
Merge pull request #446 from gtch/clean-main

Moved newNotificationQueue to Environment to avoid using reflection
Reduced memory usage, especially on Windows 8

Reintroduced the forced garbage collection to fix out-of-control memory usage on Windows 8. Every three seconds the monitor loop will now run a garbage collection instead of sleeping the thread. This has the effect of preventing the memory usage from compounding over time... without this forced GC it was common to see Windows allocating all available system memory to the uploader after a period of time, even though the number and size of Java objects was small and fairly constant. It's not apparent why forcing the GC is necessary but on my test Windows 8.1 it does seem to have completely fixed the problem.

See #343 and #380 for more details. This should fix the various problems people have reported with memory usage such as #279, #281, #305, #330, #354, #428, #433, but I will test some more to make sure before releasing.
Merge pull request #449 from gtch/master

Reduced memory usage, especially on Windows 8
New implementation of the automatic updater

This new updater makes requests directly into the GitHub API to identify the latest version, instead of requiring us to manually update the version files and check them it. It's also implemented as a separate module, allowing it to be run while the HearthStats Uploader is closed and thus avoid problems where the uploader isn't updated properly because it's in use.

Note that I haven't yet implemented most of the necessary error handling, so it will currently throw exceptions if there are no new releases published (which is the case right now...)
should fix #385 : display popup when game mode is not detected
dash handled in deck construction, fix for #420 #432
rename method
convert MatchPanel to scala
fix #454 : notify MatchPanel to update display
integrate travis with gitter
Prettier UI for the updater, more robust error handling
New logo, new name!
Added Windows support to the new updater.

Also cleaned up a comments and loig statements.
Made background image on updater larger to suit Windows UI