Provide config option to force SSL in upload url

Fixes url and ssl configurations
[docs] Update sample application to use progress callback
Bump version to 1.3.0
[docs] Update info about SSL field
Merge remote-tracking branch 'upstream/master'

* upstream/master:
  [docs] Update info about SSL field
  Bump version to 1.3.0
  [docs] Update sample application to use progress callback
  Provide config option to force SSL in upload url