Added more descriptive tooltips for the emoticon buttons

Fixes for issues #2955, #2942, #2941, #2984

Compiling bbb-fsesl-client

try to speedup getrecordings, could reduce from 35s to 25s, but it's still not enough; need to better understand where's the bottleneck

Update demo_footer.jsp with correct link to API docs

Minor UI changes for the Flash client

Added check to see if the properties have been already updated by displayThisSlide() after receiving a presentation_page_changed message.

Fixes #2768

Expire redis keys after 14 days

Avoid scala warning messages

Assigning widthRatio to default value when the currentSlideDoc is not loaded yet. Removing errors from the console.

Simple modification to avoid multiple start audio recording events

Improve pdf2swf conversion

   presentation conversion threads. If the presentation takes a lot of time and cpu to convert,
   other uploaded presentations gets queued up and cannot be processed in parallel.

Do not reconnect when user kicked