Set development version: 0.2.3-dev
Rename Api -> Url. Refactor totally
Fix tests according to refactor
Fix behavior extend tests according to refactor
Add all methods test for joined url also
Fix urljoin import for Python 3
Since api changed in refactor, remove useless add_trailing_slash option
Add comment about bump parameter
Move api documentation to code
Fix old readme examples
Change 'slogan'
Add api document back
Fix formatting
Fix heading format
Fix heading
Fix link
Fix doc link
Try link with dot
Add examples to http methods
Remove example text to save space