experimental new HomeView
new home view
cells connected to VC
new color scheme and buttons in Test Mode
experimental: dial component in Home View to select Global Level from beginner to Expert (based in current frequency param)
bug fijes
dial View connected to Level selection
history VC header correction
Merge branch 'refs/heads/oswaldo'

Conflicts:
	IrregularVerbs.xcodeproj/project.pbxproj
	IrregularVerbs/HistoryViewController.h
	IrregularVerbs/HomeViewController.m
	IrregularVerbs/HomeViewController.xib