Add option to set key to "key|comment".
Merge branch 'master' of https://github.com/Cocoanetics/DTLocalizableStringScanner

Conflicts:
	Core/Source/DTLocalizableStringAggregator.h
	Core/Source/DTLocalizableStringAggregator.m
	Core/Source/DTLocalizableStringEntry.h
	Core/Source/DTLocalizableStringEntry.m
	Core/Source/DTLocalizableStringTable.m
	Demo/Source/main.m
Add comment as key context