Add query parameters for start/end

IGV-2016
Remove debugging log statements
Fix bug where right clicking on alignment track name doesn't bring up menu

Weren't checking for null ReferenceFrame in addConsensusSequence
Add message to user when can't export consensus sequence
Use FrameManager to get frame if only one exists when user clicks outside the data panel

IGV-1961
Fix bug in HttpUtils.useByteRange, change required number of sample bytes
Improve logging in IGVUrlHelper
Lazy load GenomeListItems. This is not very seamless, as we only store the ids locally, not the displayable names
Look at genome cache when populating genome combo box, use displayable name when possible
Properly rebuild genome list after manage dialog is dismissed

Guard against not being able to contact server for genome information

Remove redundant error messaging

IGV-2014
Merge remote-tracking branch: upstream/master