applied namespace
Merge remote-tracking branch 'ritalin/apply-namespace' into devel

Conflicts:
	src/Ginq.php
	src/Ginq/Iterator/ConcatIterator.php
	src/Ginq/Iterator/CycleIterator.php
	src/Ginq/Iterator/DropIterator.php
	src/Ginq/Iterator/DropWhileIterator.php
	src/Ginq/Iterator/GroupByIterator.php
	src/Ginq/Iterator/RangeInfIterator.php
	src/Ginq/Iterator/RangeIterator.php
	src/Ginq/Iterator/RepeatIterator.php
	src/Ginq/Iterator/SelectIterator.php
	src/Ginq/Iterator/SelectManyIterator.php
	src/Ginq/Iterator/SelectManyWithJoinIterator.php
	src/Ginq/Iterator/TakeIterator.php
	src/Ginq/Iterator/TakeWhileIterator.php
	src/Ginq/Iterator/WhereIterator.php
	src/Ginq/Iterator/ZeroIterator.php
	src/Ginq/Iterator/ZipIterator.php
	src/Ginq/Lookup.php