1.0.0-beta5: filepath.Rel may fail. Sticking on absolute path comparison

Download it from

• http://downloads.arduino.cc/tools/arduino-builder-linux32-1.0.0-beta5.tar.bz2
• http://downloads.arduino.cc/tools/arduino-builder-linux64-1.0.0-beta5.tar.bz2
• http://downloads.arduino.cc/tools/arduino-builder-macosx-1.0.0-beta5.tar.bz2
• http://downloads.arduino.cc/tools/arduino-builder-windows-1.0.0-beta5.zip