Add ./examples README & basic build instructions (#236)

* Added ./examples README

* Add build description to README's

* Update README.md

Co-Authored-By: Hero Bird <robin.freyler@gmail.com>

* Update README.md

Co-Authored-By: Hero Bird <robin.freyler@gmail.com>

* Update examples/README.md

Co-Authored-By: Hero Bird <robin.freyler@gmail.com>

* Update examples/README.md

Co-Authored-By: Hero Bird <robin.freyler@gmail.com>

* ABI -> Metadata

* ABI -> Metadata pt. 2

* Wording for --force

* Removed testing paragraph

* Update examples/README.md

Co-Authored-By: Shawn Tabrizi <shawntabrizi@gmail.com>

* Update examples/README.md

Co-Authored-By: Shawn Tabrizi <shawntabrizi@gmail.com>

* Update README.md