Added missing class keyword.
Changing notice of gem version in Gemfile to ~> v.2.7.1
Adding 'bundle exec' to some shell examples.
Fixing some wordings and sentences.
Adding PostgreSQL to list of databases
Changing sentences because of the wording.
Update readme
Show correct way of loading authorization file and rendering icon for modules.
fix wrong option name in code example.
Enhancing the example of a picture_gallery element creation.
Add more words for better understanding the alchemy:scaffold task.
Improve element prologue.
Fixes gramar.
Remove sentence that has already been said before and confuses here.
Fix grammar
Updates link to TinyMCE buttons documentation
Corrects dead links
Updates internal structure
Changing sentences because of the wording.
Enhancing the example of a picture_gallery element creation.