docs(app): add basic documentation to missing classes

See #43.

app/scripts/services/escapeHtml.coffee

@@ -2,9 +2,9 @@
 
 ###*
  # @ngdoc service
- # @name seaspongeApp.escapeHTML
+ # @name seaspongeApp.EscapeHtml
  # @description
- # # escapeHTML
+ # # EscapeHtml
  # Factory in the seaspongeApp.
 ###
 angular.module('seaspongeApp')

app/scripts/stencils/base.coffee

@@ -1,3 +1,10 @@
+###*
+ # @ngdoc service
+ # @name seaspongeApp.BaseStencil
+ # @description
+ # # BaseStencil
+ # Factory in the seaspongeApp.
+###
 angular.module('seaspongeApp')
 .factory('BaseStencil', [ ->
 

app/scripts/stencils/stencils.coffee

@@ -1,3 +1,10 @@
+###*
+ # @ngdoc service
+ # @name seaspongeApp.Stencils
+ # @description
+ # # Stencils
+ # Factory in the seaspongeApp.
+###
 angular.module('seaspongeApp')
 .factory('Stencils', [
     'GenericTrustBoundaryStencil'