Correct way to merge path parameters.
Correct way to merge path parameters.

Fixes issue #90.

euank/moebooru-thin,euank/moebooru-thin,moebooru/moebooru,nanaya/moebooru,moebooru/moebooru,moebooru/moebooru,nanaya/moebooru,euank/moebooru-thin,nanaya/moebooru,nanaya/moebooru,euank/moebooru-thin,euank/moebooru-thin,nanaya/moebooru,moebooru/moebooru,moebooru/moebooru