Merge pull request #20 from strukturag/pretty_print

Always create readable JSON strings.
Merge pull request #23 from strukturag/patch_and_head_support

Added support for HEAD and PATCH requests.
Merge pull request #21 from strukturag/wrapper_support

Added support to add API resources with a wrapper handler function.
Implemented support to return arbitrary content-types.
Added myself to authors.
Merge branch 'rawdata'

Conflicts:
	core.go