Merge pull request #46 from xnova/master

include 'network' in the library exports
remove isArray shim

[closes #40]
update testling config & add badge to readme

[#48]
* Fixes address.js to be able to deal with testnet P2SH addresses
* Enhanced address.js testsuite...now also verifies address versions
* Enhances README to show how to run test suite