Bug fixes in FTPUtils
Replace tribble FTPUtils with local copy (temporarily)
Fix some import problems
Further FTP cleanup.  Data load method rename (preload -> load).
Fix broken isGenomeSpace test (for ATM, unused API but we still test it).
2 fixes -- computatin of tabix index path.   Improper use of gunzip stream (was used on BlockCompressedInputStream) due in turn to use of wrong ParsingUtils class.
Fix to TrackLoaderTest  (we now whitespace delimit bed files, in conformance with UCSC).
Change reused url string to use static field
Cleanup of session loading
Add (headed) tests for saving/loading sessions with overlay tracks

IGV-1979
Add test for loading a bad bed file

Want to make sure we throw an exception
Revert test.bed, rename a test file to be more informative
Alternate implementation of resourceAvailable for FTPUtils
Merge remote-tracking branch: upstream/master