Update overview.md

Correct two spelling errors
Merge pull request #12 from dani0010/patch-1

Update overview.md
Mistaken copy-paste: incorrect folder of script files
Merge pull request #14 from kurol/master

Mistaken copy-paste: incorrect folder of script files
Pull sails-generate-sails.io.js into its own generator.
Use v0.11.2 of sails-generate-sails.io.js
0.11.0
changed to scripts