show attempts for openended problem, but for that problem still not shownig scores
refs #1792
fix 'save_answer'
revert po files
Merge pull request #25 from smartdec/iss2127

Iss2127
Merge pull request #26 from smartdec/feature/trueAttempts

/Feature/true attempts
Merge pull request #27 from smartdec/iss3195

Iss3195
try catch
Merge branch 'select/release' of https://github.com/smartdec/edx-platform into select/release
i18n update
xls file ext, download full stat buttons, proper course names in dropdowns
stat page style improvements: margins etc