Remove duplicate reference to OS requirements.
Remove a space between two profiling alternatives.
Refer to license information instead of license key (we can also specify a server URL for example, if a floating server is used). Link to requirements section.
Merge branch 'dev'

* dev:
  Refer to license information instead of license key (we can also specify a server URL for example, if a floating server is used). Link to requirements section.
  Remove a space between two profiling alternatives.
  Remove duplicate reference to OS requirements.