clean - deleted repeated vcs
externals - added MZTimerLabel
externals - added nsnumber+nstimeinterval category
timer - initial implementation
externals - added jgprogresshud
timer - implemented
topics - initial implementation
timer - implemented
merge - tableview
workervc - superclass
completedcoursesvc - initial implementation
coursevc - deleted some buttons
deleted - original ladybug loginvc
profilevc - fixed bugs
certvc - initial implementation
db - setup quiz schema
quizvc - implemented