feat(filter:json): add json filter

Closes #142
chore(directive): remove ng-controller

Closes #122
feat(Http): docs for the Http service.
chore(doc): correct typo
chore(directive): remove mg-controller from demos

Closes #122
chore(directive): merge all directives into single library
docs(Http): HttpBackend, HttpResponse, defaults.
feat(NgAnnotations): allow ignoring child nodes during compilation

BREAKING CHANGE:
- NgDirective loses 'transclude'.  Transclusion is indicated by setting
  the 'children' string enum to NgAnnotationBase.TRANSCLUDE_CHILDREN.
- NgNonBindableDirective / ng-non-bindable suppressing compilation only
  on the child nodes but does not prevent processing other directives or
  interpolations on the same node.
fix(NgAnnotations): remove debugging trace
feat(ng-template): also support script[type="ng/template"]

Closes #137
feat(filter): add number, currency, date

Closes #139
Closes #140
Closes #145