join action now redirects to root_path on failure
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flash[:error] now displays to page on invalid join
room model now includes custom length validation
room model now validates on legal characters
create route now flashes errors on failure
index page flashes errors
errors rendering correctly

- meets error message convention
- validates on characters first for clarity
punctuation
error div styling
fixes punctuation and capitalization
adding error display div to landing page

- also fixes indentation
Merge pull request #25 from jonjchew/room-fixer

Room fixer