add and remove task from project.

1: project administration 

Task-Url: http://github.com/man-at-home/totask2/issues/issue/1
1: project administration 

Task-Url: http://github.com/man-at-home/totask2/issues/issue/1
change to restlike urls, more tests, partly error handling.

1: project administration 

Task-Url: http://github.com/man-at-home/totask2/issues/issue/1