Upload an excle template, that works with the Excle_to_Jason with more options

See merge request !2

Upload a Exel_to_Jason with more options

See merge request !1

Upload New File: converts an excel sheet (e.g. /Users/fierz/Documents/myPython/myPyniViz/tst/_laret-yyyymmdd_excel2nivizJSON-CF-v13-tst.xlsx) into a niViz compatible JSON

The support for oswr is still present in the TimeSeries preferences but
duplicated with rswr.

So the defaults are now the same as SMET defaults (by the way, OSWR will
have to be renamed as RSWR, synchronized with smet).

Fix for issue 614: time series graph can either apply user settings or plot (i.e. SMET file) settings for choosing min/max, color, units, etc - autoscale can be turned on and off independently.

Fix for issue 800: number version visible in help. This version number is simply the latest annotated git tag of the master branch. Furthermore compile time and a link to the change log is displayed

Fix for issue 600: print title of the plot. Note that you need to turn on printing header and footer in the browser's print dialog.

BarGraph: PNG rendering rollout - when using the bargraph to visualize profiles while hovering above the timeline a fast PNG rendering algorithm draws the profile, if the mouse is still for 500ms the image is drawn as SVG

SimpleProfile: removing the _draw function - rendering the bargraph immediately when receiving a new profile