[SatTrack] RealTime satellite tracking; viewing satellites in 3D (with EarthView) 2D (with MercatorProjectionView)

Here is the satellite tracker plugin.  Now MCT has some really interesting data for potential users may play-with: actual-real bona-fide satellite locations! Hooray :dancer: :tada: !  This plugin is a flagship-example for plug-in development: comments have been added throughout the source-files that guide the developer to the design-style and requirements put-forth by MCT's structure.  Also, this plug-in talks to the EarthView plug-in (to draw satellites in 3D), which developers will surely enjoy (code-reuse).  With this new data, users will see how views and feeds in MCT interact, especially seeing historical plot information via the PlotView.

Apologies for all the messy-commits before September 20th and the subsequent reverts to remove them; at the time I was quite green to git.

Todo:
<UL>
  <LI> Design some pre-made canvas views for users to look-at when downloading MCT.
  <LI> A few more comments will be necessary (specifically how satTrack talks to EarthView)
  <LI> Pan and zoom in MercatorProjectionView needs cleaning-up
</UL>