Merge pull request #572 from ainsej/master

Minor cleanup of booleans, unused needed vars & spelling in SelendroidSt...
Added --help option to standalone-server
Merge pull request #573 from ainsej/print-help

Added --help option to standalone-server
Separated SelendroidLauncher main, to allow for easier programmatic calling
Merge pull request #574 from ainsej/launcher-get-instance

Separated SelendroidLauncher main, to allow for easier programmatic call...