CYB-181 Check for nil input for student string data, supply empty string
NOJIRA - improve the travis build
Merge pull request #96 from coyote/handle_nil_student_string_data

CYB-181 Check for nil input for student string data, supply empty string
Merge pull request #97 from christianv/nojira-improve-build

NOJIRA - improve the travis build
CYB-178, some parts render (chicklets), images still not rendering.