Added bare discussion section
Collins reference added
Merge branch 'master' of https://github.com/shreyasmandre/test-paper-test into doc/references
Merge branch 'doc/discuss'
Merge branch 'master' of https://github.com/shreyasmandre/test-paper-test
Merge branch 'master' of https://github.com/shreyasmandre/test-paper-test
Merge branch 'master' of https://github.com/shreyasmandre/test-paper-test
Merge branch 'master' into doc/intro