enroll a course
added another error option
commit only 2 files
commit only 2 files
commit only 2 files
return json
checknet
fixed conflict
kanw commit gia na parw ta pull
kanw commit gia na parw ta pull
Merge pull request #42 from Johnie-z/master

Unenroll from course
Merge pull request #34 from papadakisemmanouel/master

 POST /enrolled_courses/:cid #4
teleiwsame!
Merge pull request #44 from papadakisemmanouel/master

teleiwsame!
Mark read announcements