multiple applications support

[Phil Pirozhkov]

i'm still not sure if Ryan should support multiple applications, i.e.
you can run it and
Ryan reads folder from where it's being run and check for subfolders,
exposing
each subfolder as a separate application to web.
> cd applications
> ls
demo test1 test2
> ryan
Starting up Ryan at port 8001

will expose:
http://localhost:8001/demo
http://localhost:8001/test1
http://localhost:8001/test2

applications can have different (or same) databases, are allowed to
exchange data from another applications, but can be removed/added
dynamically

this one can be postponed, but the more code Ryan has, the more
changes will be required