Refactor Cufflinks codecs into separate files
Set DefaultUseCaches(false) in HttpUtils.openConnectionStream

This should affect all opening of streams even from libraries. We may not want that, but it seems preferable at the moment. Bugs keep creeping up which are resolved by setting use caches to false.

IGV-1922
IGV-1924
Add chrom.sizes files
Modify tools build script to use chrom.sizes file
Bug fix in tools build script
build-tools script tweak