Update README to reflect loss of scipy dependency
Fixed multiprocess port re-use on windows
Corrected bug in multiprocess causing deadlock at exit
Multiprocess debugging messages now use one color per process
Corrected RemoteGraphicsView not setting correct pg options on remote
process

New debugging tools:
* util.cprint for printing color on terminal (based on colorama)
* debug.ThreadColor causes each thread to print in a different color
* debug.PeriodicTrace used for debugging deadlocks
* Mutex for detecting deadlocks
clean up debug messages
Rename Mutex module
Fixed multiprocess deadlock on windows
Added several utilities and debugging tools
Merge branch 'multiprocess-fix' into develop
Removed extra image window from VideoSpeedTest