Remove Ant build, not maintainable
#111 : Fix thread safety issue
#34 : Upgrade to Pegdown 1.4.2 (adds support for Github strikethrough text)
Make preview tab always second tab
#140 : quick hack to get anchor links working
#140 : quick hack to avoid NCDFE on non-Java IDEs
#133 : Fix editor not restored on restart
Update license file headers
Update plugin descriptor for 0.9.4 release