TestClassForStatisticsFunctionsClass : a class that tests all of the
functions in StatisticsFunctionsClass
add new pages to the administrator
Merge branch 'master' of https://github.com/aglos/A-Smart-Lecturer into avshalom
pull
Merge pull request #73 from aglos/sharon2

after abu destroy all classes
added css
Merge pull request #74 from aglos/avshalom

Avshalom
fix problem
fix another problem
1. add more data in statitcs page (min, max, avg..)
2. locked access page to unauthorides accesses
3. servlets for adding / editing excrise
last deploy!! the original master