fire a warning before closing an unsaved file
added input box for a faster file search and opening
fix input search z-index
added buttons to manage editor font-size
Merge pull request #107 from robertop23/master

Fixed Uncaught CodeMirror.Pass
fixed Issue 1528:SQLFORM.smartgrid: Bug in links, thanks jjachuf
allow customization of  default /manage/auth, thanks Anthony
Merge pull request #108 from ilvalle/editor

Editor improvements
better layout.html and web2py_bootstra.css, thanks Paolo
no references in archive tables
fixed Issue 1532:mongodb: why to catch connection exceptions? thanks Alan
fixed Issue 1530:Impersonation events not recorded if redirections onaccept, thanks kmouts
fixed Issue 1522:Trigger for primary key on oracle database
merged some code form issue 1534 Session ID not changed after privilege level change, thanks kablubr
fixed Issue 1538:Update Script setup-web2py-nginx-uwsgi-centos64.sh, thanks jniltinho
more secure sessions, now pass tests, thanks André Kablu
fixed  Issue 1539:user_groups are not updated during and after impersonation, thanks kmouts
added/removed files to hg/git, thanks Lightdot
removed unwanted print statement
no clickable headers for virtual fields, thanks Anthony