implemented Post.json

also added app to PostHandler and Post constructor
implemented DoPostSingleHandler

also added ui to DoPostHandler constructor
ported Pyng to new brick architecture
added Pyng to default configuration
Merge pull request #50 from NoyaInRain/generic-brick

Generic brick
Merge remote-tracking branch 'origin/master' into history

Conflicts:
	wall/__init__.py
	wall/bricks/url/__init__.py
	wall/res/static/wall.js