Set indentation settings to four spaces at the project level
Add unit test with emoji
Add test with nil query string
Add test with nil dictionary
Pass test with nil dictionary
Add test with empty query string
Do not throw an exception on empty strings
Pass test with empty query string
Add test for empty query string key
Add test for empty query string value
Add test for query string without equal character
Add test with unserializable key (NSDate)
Add test with unserializable value (NSDate)
Merge pull request #3 from 0xced/more-tests

More tests and a few fixes.