Updated the Acknowledge function  

this should solve the problem of alerts going on (or under) monkey window
new 64bit random functions
display on monkey window
updated gitignore to ignore the dropbox icon that is automatically being added to the directory
Merge commit 'e35724e30b71adf2021d1b777b495e92fe6a0306'
trying different random functions via stimdefs.h
Merge remote-tracking branch 'binoclean/master'
64bit random number generators.
added sound to acknowledge.
glstatusline now show stimulus values, trial count