Added Advapi32Util accessCheck method to verify file permissions
Addressed code review items from pull request
Added test for com.sun.jna.platform.win32.Advapi32.AccessCheck and updated changelog markup
Changed Advapi32Test.testAccessCheck to work on non-US-English systems and general cleanup
Merge pull request #301 from BusyByte/master

Added Advapi32Util accessCheck method to verify file permissions