Refactored the way environment is prepared in JRubyExec (to less lines of code)
Address path variable in a platform-sensitive manner when preparing the JRubyExec environment
Refactored computation of a working search path when using GEMs so that it works properly in a cross-platform manner
project.jrubyexec now uses the same environment preparation as JRubyExec
Made sure that if getGemWorkDir changes value, that JRubyExec will rebuild
Stop Appveyour CI if one of the matrix builds fail
Looks like the previous fix for handling search path in a cross-platform way was broken
Clean up some bits after confirming that system search path works cross-platform
Updated CHANGELOG in preparation for upcoming 0.1.11 release
Merge pull request #95 from ysb33r/master

FIXED #83, #92, #93