add passing tests for tobics, subtopics and turoials
added validations and corresponding tests for subtopics
Merge pull request #23 from nealcpeters/models

added paragraphs and contents controller
Merge branch 'master' of https://github.com/nealcpeters/infobytes into testing
changed name sub_chapter spec, edited chapter spec test
Merge pull request #22 from nealcpeters/testing

add passing tests for tobics, subtopics and turoials
Merge branch 'master' into models