clean up old license headers; remove old files
add script to add license headers
add GPLv2 (or later) license to all python files
Merge pull request #836 from ilastik/improved_license

add license header to all python files
fix wrong call to logger
Readme: Removed Travis badge.
ProjectManager: Fixed crash when attempting to "Save As" if the original project is read-only.
tests: Added basic recorded test cases for carving.