chages data structure to create-survey form
adds option to destroy dependencies when destroying a Survey
adds multiple question functionality
fixes bug that displayed 'submit' button multiple times when taking a survey
fixes algorithm to take surveys with mulitple questions
adds multiple graphics in results (buggy)
fixes overlapping graphs bug
Merge branch 'master' of https://github.com/nullet/surveygorilla into create-survey
Merge pull request #18 from nullet/create-survey

fixes create survey algorithm & bug with d3 in multiple-question surveys