Merge pull request #79 from Dcousens/master

Fixes #78 for alternative constructor syntax
Changes to new version-less ECKey API
Restructures test/eckey.js
Fixes network tests for proper address types
Merge pull request #80 from Dcousens/versionextract

Extracts version from ECKey private/public key utility class
upgrade crypto-js (uglified source no more)

thank you @evanvosberg, @kyledrake. [evanvosberg/crypto-js#6]