working on static db:
filter: select circles using ajax
fetch data from db to: 
1. when reading data from select boxes (add new grades page)
2. when trying to add new grade to course
3. when submiting grade - show then on statics page
fix grade text limit
added paging to lecturer page
added new studentes
fixed filter to checker new grade
y-scroll css fix
Merge pull request #37 from aglos/sharon

working on static db