[TEST] Add spec for inbound bridge.

[TEST] Cleanup initial spec.

[DOC] Update README with testing instructions.
[FEATURE] Add empty CryptoCoinBridge class.
Merge branch 'master' into spec

Conflicts:
	test/inbound_bridge.js
[TASK] Properly renmae bridge.js to crypto_coin_bridge.js
[FIX] Rename require statement.
Merge pull request #10 from ninobrooks/patch-2

Delete postgres.js
Merge pull request #11 from ninobrooks/patch-1

Update README.md
Merge pull request #9 from gatewayd/spec

[FEATURE] Add CryptoCoinBridge class missing implementation