Replaced all references to simulation with emulation
Updated copyright year
Updated .gitignore to reduce chances of random files being uploaded to
the repo
Added .gitattributes to normalize all text files, and to ignore binary
files (which includes the logo and the NEC PDF)
If we're doing a cache operation in the DC stage, don't
change the stage of the lines; the cache operations will
do it if needed. Also implement get/set taglo for DC.