Provides a way to specify the position of the Y-Scale.

In the track configuration, a new key value pair can be specified.
The key "yscale_position" can take the values {"left", "center", "right"}

By default, the scale is placed at the center of the track.
Just a variable rename
make it clear that the set highlight dialog defaults to the currently visible region
Added dkasenberg/FileSaver as a submodule, forked from eligrey.  Will allow ability to specify filename when saving tracks
fix REST store url construction, make sure baseUrl seUrl always has a trailing /
comment out SPARQLStore spec from jasmine tests, it is not in this branch
fix gff3 unit tests
remove "no data" popup warning
fix @dkasenberg yScalePosition config var renaming
fix trailing comma in Ruler.js
correct yScalePosition in release notes
release 1.9.8
Modifying track download to allow user to select filename
Altered View/Track/ExportMixin.js to allow user to enter filename for track's saved data
Added filename textbox to Export View window
remove unnecessary use of appendChild, fix some whitespace and reserved word errors
add save-generated-files to JBrowse/has, use it in Export feature sniffing.  also add `noExportFiles` config var
replace export View dialog filename textbox with a dijit textbox, looks better in that context.  also associate it graphically with the save button
factor export view-dialog code into a separate method, trying to trim this nasty thatch of code a bit
add save filename to the release notes