Finished up password grant
Implementing storage interfaces
Updated the interfaces and dropped oauth version

Seems the oauth lib's stable version is 3.2, dropped down from the 4 version
to that.
Swapped oauth lib
Switched oauth lib

Wasn't pleased to find that the new lib used the username as the primary key
across a bunch of tables. Not ideal IMO.
Fixed dependency version
Tweaking the schema
Tweaked schema some more.
Implemented refresh tokens

Right now it's hardcoded to always return a refresh token when you issue an
access token. Should think about making this an optional workflow or committing
to it being turned on indefinitely.
Merge branch '2.0' of git://github.com/picklesphp/pickles into 2.0

Conflicts:
	src/OAuth2/SessionStorage.php
Merge branch '2.0' of github.com:picklesphp/pickles into 2.0
Merge branch 'master' into 2.0

Conflicts:
	composer.json
Made refresh_token grant configurable
Merge branch '2.0' of git://github.com/picklesphp/pickles into 2.0
Dropped browser class

Actually moved it off to joshtronic/php-remoteaddr
Dropped Number class

Actually just moved it to joshtronic/php-ordinalindicator
Dropped file class

All it contained was a method to remove a directory recursively. Moved
files over to joshtronic/php-rmr (rm -r)
Dropped Sort class

Moved it off to joshtronic/php-sort
Dropped Convert class

All it contained was an array to XML function. Moved off to
joshtronic/php-array2xml
Dropped Distance class

Moved off to joshtronic/php-distance