Add getBackgroundDrawable to ShadowWindow
Merge pull request #822 from pivotal-odell/window-get-set-background-drawable

Add getBackgroundDrawable to ShadowWindow
Speed up resource reading by caching results of JAR file parsing.
Merge pull request #824 from aweber/cache_jar_file

Speed up resource reading by caching results of JAR file parsing.
Move test class to test tree.
Temporarily disable Travis deploying to Sonatype

Travis was deploying all commits (including pull request branches) to Sonatype :rage3:
Don't deploy pull-request branches to Sonatype
Make Maven deploy script work with POSIX shell.
Fix yet another POSIX shell issue.