Office Update

These series of commits improve the Office applications in the following way:

 - eyeVisor now has a 'please wait' message to display rather than just showing a blank space whilst a conversion is taking place
 - eyeConverter possesses better error detection, hopefully preventing the ugly php error display we had before
 - the unoconv submodule has been redirected to a version that should work better with oneye. (I'm still waiting for @dagwieers to acknowledge (comment on, merge or otherwise) the [pull request of the changes](https://github.com/dagwieers/unoconv/pull/101).)
 - eyeControl has some additional UI elements to help the root user with regards to detection of python and unoconv