generating error_msg after form submitting. Now it display all errors
csrf_token included
refactoring: changed response of send_handler and tests,
encodings
500 -> 405 code of save form, if uses GET
merge 3 into 4
test count widget restored and redesigned (better flexibility)
refactoring & unused references
refactoring: textarea custom widget more flexible
merge 4 into 5
refactoring
Merge branch 't5-show-total-count-of-notes-use-custom-context-processor' into t8-add-a-widget-that-can-be-inserted

Conflicts:
	project/apps/textnotes/tests.py
	project/apps/textnotes/views.py
	project/urls.py