Moving 2.7 (stable) branch to master.
Making set_argument() parameters consistent.
Changing set_arguments() parameters.
Fixing undefined index on option save.
Updating readme.txt
Addressing issues #14 & #15. Porting changes from 2.8 to 2.7
Completing merge
Update README.md
Update readme.txt
Merge branch 'master' into 2.8

Conflicts:
	README.md
	composer.json
	readme.txt