Fix for problem orders in results page (#467)
Fixed problem with file extensions when exporting solutions from contest
Version 1.4
Synced the latest code from the TFS: changeset 2334 build 3579
Merge remote-tracking branch 'upstream/master'

Conflicts:
	Open Judge System/Web/OJS.Web/OJS.Web.csproj
Merge branch 'master' of https://github.com/Teodor92/OpenJudgeSystem