'.max' returns 'nil' for empty array...
Adding rake task to build any surveys that have changed since their last build
Correcting typo that came in when testing rake survey parsing
Merge branch 'master' into survey_generator

Conflicts:
	db/schema.rb
Merge branch 'master' into survey_generator

Conflicts:
	db/schema.rb
Merge pull request #97 from theodi/survey_generator

Survey generator