Add get forum function.

Implemented by @gh2014Babis
Change to login button in index.html , modified css for login form and close buttons in others and in style in jquery-mobile for working slide screens.
Merge pull request #2 from maellak/add_get_forum

Add get forum function.
Merge branch 'master' of https://github.com/maellak/openeclass-mobile
Add announcement read function
Fixed errors
merged working stuff
Re-added original jquery mobile css
misc fixes
url
rm forum and login button

Signed-off-by: 'KostasDasios' <'gostaz13@gmail.com'>
Fix announcement read
fix issues
Signed-off-by: 'KostasDasios' <'gostaz13@gmail.com'>
Fix login url
Fixed file viewer
Add default url