Adding ability to filter log on multiple strings within quotes
Adding ability to disable the console.log line if desired. On by default.
Fix for Issue #43
Added safety factor to downloadRatio calculation
Changed property name from enableLoggingToBrowser to logToBrowserConsole for consistency. 
Added a missing semicolon to the DownloadRatioRule.
Merge branch 'refs/heads/development' into multilevel-buffer
BufferExtensions: 
1. created an init method called by the bufferController to remove the race condition of the manifest not being loaded yet. 
2. moved const values into public static scope. 
3. added the delay back in to the shouldBufferMore logic. 

BufferController:
1. created multilevel validate interval so that the client processes faster at startup and once stable reduce the validate cycle.