Changed control flow of index.gsp for multiple sequences

Signed-off-by: Joseph <josel@pdx.edu>
Codon distribution charts now allow two sequences

Signed-off-by: Joseph <josel@pdx.edu>
Merge branch 'frontend', minor non-critical edits

Conflicts:
	grails-app/controllers/webapp/MainController.groovy
	grails-app/views/main/index.gsp

Signed-off-by: Joseph <josel@pdx.edu>
Added header to analysis options menu

Signed-off-by: Joseph <josel@pdx.edu>