Reverse the check for http response code.

There are many codes other than '404' which indicate that the media
file is not present or otherwise unusable. Instead of checking for
a particular failure mode, check for explicit success.

I ran into this on a server that had directory listing disabled, and
returned a 403 (access denied) error on non-existant files.

FileUploader window fixes

Pretty micsettings

Conflicts:
	bigbluebutton-client/src/org/bigbluebutton/main/views/MicSettings.mxml

Enabled colorpicker

fixed bug 1716 - fixed an index out of bounds exception in repeatChatMessage

Related to issue #1710

Support pdf extension in uppercase https://code.google.com/p/bigbluebutton/issues/detail?id=1711

Re-enabling the common shortcut keys to change the slides

fixed an issue with keepToolbarVisible and an issue with the toolbar dissapearing when clicking the presentation window

Adding Start/Stop Recording feature

Conflicts:
	bigbluebutton-apps/src/main/java/org/bigbluebutton/conference/Room.java
	bigbluebutton-apps/src/main/java/org/bigbluebutton/conference/service/participants/ParticipantsEventSender.java
	bigbluebutton-apps/src/main/java/org/bigbluebutton/conference/service/recorder/participants/ParticipantsEventRecorder.java
	bigbluebutton-client/branding/default/style/css/BBBDefault.css
	bigbluebutton-client/src/org/bigbluebutton/main/model/users/UserService.as
	bigbluebutton-client/src/org/bigbluebutton/main/model/users/UsersSOService.as