Update README.md
release 1.7.6
Added vertical scroll bar
Increased the width of the vertical scroll bar.
Changed vertical scroll bar css.
tweak vertical scrollbar color a bit more
improve .gitignore, making some rules a bit more specific, and adding setup.log and release-notes.html
Revert "globally disable all focus outlines.  they cause nothing but trouble".  Caused a bit of a performance problem.

This reverts commit e0cc8ab93ee54c990b7dbafd4df9733eea1fe2ec.
update jbrowse screencast script with new features
more demo script updates
more screencast script updates
Merge branch 'maint/1.7.x'

Conflicts:
	.gitignore
	main.css
	release-notes.txt
Merge branch 'master' of github.com:GMOD/jbrowse
sort new reference sequences in refSeqs.json by name.  closes #187
bugfixes to Sequin export support
Merge branch 'master' into hash_store