Merge pull request #106 from ostepu/version_0.1_fix_I

Version 0.1 fix I
ability to flip status array in CourseStatus structure implemented
bug in DBTransaction fixed (missing $)
comment fixed
isset() instructions added
http_put fixed (sends no content in request body)
new lines added to connect studip with ostepu
url changed
Merge pull request #107 from ostepu/version_0.1_fix_I

Version 0.1 fix II
init vid
Merge branch 'version_0.1_fix_I'
vid to getCourseInStudip() call added
Merge branch 'version_0.1_fix_I'
Merge branch 'master' into version_0.1