Add initial RSA impl and event creation

* Add test RSA files and rsa columns to db tables
* Add initial event creation function & query
dev
Merge remote-tracking branch 'origin/features/add_initial_rsa_impl' into features/contracts_and_stuff

* origin/features/add_initial_rsa_impl:
  Add initial RSA impl and event creation
  BitcoinJS-lib added, with example hello-js.html

Conflicts:
	src/mw_contract.erl
	src/mw_pg.erl
Extend event & contract handling and postgres queries

* Extend event and contract creation functions
* Add related postgres queries
* Extend RSA encryption and add initial hybrid AES/RSA function
Various additions for contracts
Dev commit, squash in later rebase
Dev commit, squash in later rebase
Merge remote-tracking branch 'origin/features/contracts_and_stuff'

* origin/features/contracts_and_stuff:
  Dev commit, squash in later rebase
  Dev commit, squash in later rebase
  Various additions for contracts
  Extend event & contract handling and postgres queries
  dev
  Add initial RSA impl and event creation