Replace process.versions tests by browserify's package.json browser field. Fixes #329
Merge pull request #330 from olalonde/fix/329

Use browser field in package.json instead of process.verions tests
Added EC Point multiplication to browser/Point.js
Implemented Armory style key derivation from chain code and public key (WIP)
Implemented Armory initializing from seed
Armory: cleaned up example
Armory: added descriptive log in examples/Armory.js
Fixed browser exception caused by lib/Curve.js
Armory: added to bitcore.js, build.js and browser example
Armory: fixed bug.. extra lines considered as real input
Armory: from master public key
Armory: added tests
Eckey: implemented point multiplication
Armory: use native multiplication in node and javascript implementation in browser
Eckey: removed garbage comments
Eckey: renamed multiply to multiplyUncompressed for consistency