Add api get courses
Merge pull request #22 from davidath/master

Add api get courses
enable cors in index.php
fix index.php crash
 GET /enrolled_courses #3
dior8wsh
pro8esame to fix
Add /:cid/announcements API
ckaltsidis

issue #19, issue #20
Add /:cid/announcements
Merge pull request #27 from ckaltsidis/master

ckaltsidis
Merge pull request #26 from papadakisemmanouel/master

get enrolled courses
Issue #21

Added topic insert with POST method
Merge pull request #33 from ckaltsidis/master

Issue #21
enroll a course
added another error option
commit only 2 files
commit only 2 files
commit only 2 files
return json