Joachim Wuttke authored Feb 12, 2020 and Craig Scott committed Feb 14, 2020

* In summary:
  * we configure generators, not the generated installers
  * we generate installers or source packages, not source package installers

* In Introduction:
  * Make paragraph on binary installers more concise
  * Remove example that refered to CMake source tree
  * Add paragraph on source packages
  * omit the parenthesis on graphical installers