fix TypeMismatchError in Chrome Stable

fixes TypeMismatchError: The type of an object was incompatible with the
expected type of the parameter associated to the object. when turnServer
is empty.
Merge pull request #52 from maeldur/master

fix TypeMismatchError in Chrome Stable
Now Erizo Controller checks Cloud Handler several times if it does not receive answer
Resolved a bug in Nuve by which the 'option' field was handled as mandatory
Changed tests to use the latest nuve client
Resolved an issue in tests
Changed tests to make them work on other environments
Resolved a CORS error in Nuve
Resolved some errors in tests
Improved support for RTCP Packets, re-enabled ulpfec and red
Merge branch 'master' of github.com:ging/licode
Removed unused variables
Added role definition
Fixed several initialization bugs (firefox and random) and improved
memory deallocation
Removed not needed traces
Remove not needed NULL check
Removed closeSink and closeSource now we just delete the object
Changed the allocation of the buffers
Destructor log message removed
Merge branch 'master' of https://github.com/ging/licode