Adds Grace Support

Grace is a new programming language designed to help novices learn to program easier. It has been under development since 2010: http://gracelang.org/applications/. 

Here are some repos on Github using Grace:
*https://github.com/AlexSandilands/grace-phix
*https://github.com/AlexSandilands/Grace-IDE
*https://github.com/gracelang/minigrace