Add funtionality to popup the login page

The signin page is modal for the home page and the take a survey
page.  Now the submit of the sign in needs to be made AJAX.
Modal login enabled for index and survey pages
updated modal login so it can be called anytime while on survey page
modal login complete
.
Merge pull request #7 from tararoys/KJF/modal

Modal login enabled
Added gorilla pic, fixed pie chart size, and ability to update pie chart
Fixed text decoration to none
corrected user login error in modal login form and reapplied click event handling to sign-out link when needed
Merge pull request #8 from tararoys/KJF/modal

corrected user login error in modal login form and reapplied click event...
added Surveys you can participate in
Merge branch 'master' of https://github.com/tararoys/SurveyDBC
changed some styling for the create survey page
Merge branch 'master' into TLR-Refactoring-Practice

Pulling in Jacky and Kevin's latest changes.