Fix YAML/TinyXML patches for GCC versions older than 4.2
* fixed getcwd error on OSX maverick
* fixed -undefined dynamic_lookup warning on OSX
* fixed multiple extern C warning in pyglue
* fixed visibility when using clang
FileFormatTruelight: Added write support for truelight luts (with unity shaper lut)
FileFormatTruelight: Updated whitespace to match the output of Truelight
It looks the LookNoOp was copy pasted from the FileNoOp and some names were not updated
Add a description field to Look objects.