0215-FixSupportForUnexpectedBrowserLocations -> master

* Fixed download of Eurostile font so that it succeeds (and if it fai…

…ls, gives a much clearer error!). (#213)

0171 - Fix crash on FSDJump in uncharted system (#173)

Fixes #171 

* Fixed suspected flaw where we were trying to update from a key value that was empty.
* Added a test that showed the reported error and proves it's now fixed.
* Fixed the FSD jump by making sure even if we have system info in there, that we treat it as a jump and clear the hyperspace tag.
* Fixed a crash (by adding a precaution) - added a try-catch around the calls from the background watcher so it can't just die and leave the UI + logs unresponsive.

0169 - Fixed a stupid bug which meant any unmapped systems would not …

…display. (#170)

0166 - Added download + install of the missing Eurostile font.

* Added download + install of the missing Eurostile font. 
* Fixed naming in the installer.

* Divided the values by 10 as they appear to be a factor of 10 too la…

…rge for some reason (compared to the system map + EDSM). (#125)

0117 add high g indicator (#122)

* Added gravity warnings to the front end at 1 (amber) and 2 G (red)
* Added low-G green indicator for safe bodies.

0075 add available update detection (#109)

* Added the basis for a version check to the back end.
* Fixed the backend so we only send an update once the client has connected.
* Altered the front end to display an alert if a new version is available.
* Added some protection to the back end in case the version check has problems.

* Fixed creating the version on a clean release. (#89)

0086 stop crash if saved games relocated (#87)

* Fixed crashing if Saved Games has been moved to another drive / location.
* Tidied up the duplications.
* Fixed a few inor Flake8 warnings.