Fixed string->date parsing to account for locales

This forces a locale that will be appropriate for the parsed date, regardless of the locale set for the device.
Moved date formatter to Utils class

Also, the NSDateFormatter will only be instanced once, as suggested in https://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/DataFormatting/Articles/dfDateFormatting10_4.html#//apple_ref/doc/uid/TP40002369-SW10.
Merge branch 'fix-date-parsing'

Conflicts:
	BakerView/lib/Utils.h