Creation of a static database
Merge pull request #36 from aglos/Ohad's-branch

Creation of a static database, added functionality to circles & courses classes
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
test
add classes:
1.Student
2.Lecturer
3.Grade
4.Checker
add function "valid_password" to User class
and change password type to String
creation/reconstruction of the following:
academy.java
circle.java
course.java
exercise.java
creation/reconstruction of the following:
academy.java
circle.java
course.java
exercise.java
creation/reconstruction of the following:
academy.java
circle.java
course.java
exercise.java
creation/reconstruction of the following:
academy.java
circle.java
course.java
exercise.java
Merge branch 'lior' of https://github.com/aglos/A-Smart-Lecturer into Ohad's-branch
try to get AJAX work with new db :(
new functions work with ajax. need to find out how to pass circle/course
id to the drop lists in checker page (should be implemeted in
ExerciseFilter.jsg -> (for) -> value should be the id