Merge pull request #8 from dskarls/master

Dan: Fixed cohesive energy descriptions
link to wiki repo
Merge pull request #9 from dskarls/master

Dan: added quotes to "required"
Merge pull request #10 from dskarls/master

Dan: removed extra space put in from last commit
remove .gitattributes as it's unsupported by JGit

https://bugs.eclipse.org/bugs/show_bug.cgi?id=421364
add defintion-validator
check for valid selection for `type`
add instance-validator
update instance-validator
json output for instance-validator
Description notes about zero stress and zero temp.