Convert Document file(PPT, DOC etc)  to PDF
Resolved command lines
Resolved changes
Resolved constant
Remove unwanted method
Remove white space
Resolved conflict

Conflicts:

api/src/main/java/org/ednovo/gooru/domain/service/ScollectionServiceImpl.java
Merge pull request #832 from prakashraja89/master

Convert Document file(PPT, DOC etc)  to PDF