#JC-1144: Added possibility to update plugin handlers without application restart:
*PluginHandlerMapping now maps plugin handlers and application handlers separately
*Created interface-marker for plugin controllers. All plugin controllers should implement this interface to be mapped correctly
#JC-1144: New question style more like a forum
#JC-1144: Added month names localization
#JC-1144:PluginHandlerMapping refactoring:
 *Now we doesn't need more store handler state. If we want to disable some handler we should just remove appropriate mappings from map
  *Unit tests added
  *Unit tests should be supplemented
JC-1966 Added js for button "Preview"

Changes in decorators.jsp was created for testing changes between commits
After added pool preview.js in wro.xml to appropriate group all must be
good.
JC-1983 Added validation on saving drafts in PM
Merge pull request #16 from johnnybigfoot/master

JC-1983 Added validation on saving drafts in PM