Updated README for 7.0 release

Removed some old, deprecated shell scripts

Merge branch 'ckelly_develop' of https://github.com/CODARcode/Perform…

…anceAnalysis into ckelly_develop

Updated documentation of schema for function profile entries in globa…

…l database

Merge branch 'develop'

tau is now built by the Chimbuko bundle package

Added to run documentation

Added reference to viz documentation in usage documentation

Added several missing headers to API documentation