Merge pull request #4 from epifanio/master

update TWC master branch to latest pyecoop code
Merge pull request #5 from epifanio/master

added new documentations and new functions
Merge pull request #6 from epifanio/master

Added more documentation/examples
Update requirement.txt
Update README.md
Update README.md
Update README.md
Added example json-ld file for pdf provenance capturing.
Merge branch 'master' of https://github.com/tetherless-world/ecoop
Merge remote-tracking branch 'upstream/master'

Conflicts:
	README.md
remove pycharm internal files