Add delay as optional parameter to start() function

[ClearCloud8]

It would be helpful to have an option to call BlockUI's start method with more parameters than just 'message'. For example, the 'delay' parameter would be useful in some special cases:

blockUI.start({delay: 0});

This way I can globally configure via blockUIConfig to "autoBlock" on $http calls with the default delay (which is appropriate most of the time)..... yet I still have the option to override these configuration values if I manually (on a per call basis) invoke the start() method.

[DimaSamusenko]

+1