Add ability to specify "multiple highlights" or bookmarks

[cmdcolin]

This adds a couple functions to essentially have "multiple highlights". The highlights can have labels and can be different colors (maybe they are like bookmarks). You can define the bookmarks in a config file, on the URL bar, or via a web service.

I think originally the idea of multiple highlights was brought up here #482

Each bookmark has

start (int), end (int), ref (string)

Optional params

color (string for css compatible color)
label (string for label on left side)
rlabel (string for label on right side)

[cmdcolin]

Let me know if there are any bugs/needed additions for this. I had one more commit that sort of reorganized the code but it might not be necessary. Also @erasche picked this up and added some stuff to the jbrowse configuration guide http://gmod.org/wiki/JBrowse_Configuration_Guide#addBookmarks

[nathandunn]

Most likely any commits I make to it will go away.

What I need is another LocationScaleTrack in GenomeView, but that will come later, . . but not going to do that right now. If you want to re-organize and create another pull request that would be fine.

Nathan

On Feb 23, 2016, at 4:13 PM, Colin Diesh notifications@github.com wrote:

Let me know if there are any bugs/needed additions for this. I had one more commit that sort of reorganized the code but it might not be necessary. Also @erasche https://github.com/erasche picked this up and added some stuff to the jbrowse configuration guide http://gmod.org/wiki/JBrowse_Configuration_Guide#addBookmarks http://gmod.org/wiki/JBrowse_Configuration_Guide#addBookmarks
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