initial impl of task manager
add new tests for TaskManager
remove unneeded logs
update docs
fix some new lines
update docs in TaskManager
change object fields access method for @tasks in TaskManager
add logs to task's function checks
add tests for invalid task's functions and params
Merge remote-tracking branch 'origin/development' into 52_task_manager_impl

Conflicts:
	src/server.coffee
lets throw something
add simple task result notification
remove @todo
better error handling for simple task result notification
Merge pull request #64 from TheTaz/52_task_manager_impl

52 task manager impl
Merged with development.