Remove some redundant routing rubbish
Do some todos (mainly caching)
Properly serve transparent images
Contain things inside a helper function
Don't use json as a variable name
Fix some introduced bugs, allow use of gevent
More complete tilejson
Do more todos
Minor style nits
Real argument handling
Set up routes separately
Allow relative server mounting, don't make app global
Allow mountpoints
Allow static serving
Fix a relative url bug
Allow externally exposing server