API Deprecated ScheduledTask and subclasses

Base CliController or BuildTask instead, with custom cron job intervals.
MINOR: Correct exception message in constructor
Merge pull request #1196 from Instagraeme/patch-1

Correct exception message in form constructor
fixed error property $ of object is not a function

changed $ to jQuery, because without it the system would generate the following error:

Uncaught TypeError: Property '$' of object [object Window] is not a function 
Merge pull request #1202 from roed/3.1

fixed error property $ of object is not a function
Merge pull request #1195 from chillu/pulls/deprecate-scheduled-tasks

API Deprecated ScheduledTask and subclasses