iterate array correctly so that random number is actually used in signing
Merge pull request #309 from ryanxcharles/bug/signing

iterate array correctly so that random number is actually used in signing
docs in Txbuilder
add some basic sanity tests for signatures and key generation

Signing a message with ECDSA involves using a random number, and this means
that two signatures should never be the same. This commit adds some basic tests
to Key.signSync and Message.sign to make sure this is the case. Also, a new
bitcore.Key should never have the same private key twice. This commit also adds
a basic test to make sure that is the case.
Merge pull request #310 from ryanxcharles/feature/signature-sanity-tests

Signature and Private Key sanity tests
up to version 0.1.18

Critical bug fix - generating k was insecure:

https://github.com/bitpay/bitcore/pull/309
[#312] remove test from ignore in bower.json
Merge pull request #313 from JahPowerBit/master

[#312] remove test from ignore in bower.json
add docs to Address class
Merge pull request #314 from matiu/feature/docs02

Feature/docs02
remove eval

eval is unsafe, and the way it was being used in Script and Script interpreter
was not a good enough reason. This commit removes both uses of eval, then
replaces all uses of OP_XXX with Opcode.map.OP_XXX since there's no reason for
those constants to be global.
Merge pull request #321 from ryanxcharles/feature/remove-eval

Remove eval
remove unused chai dependency
Script is not used in this example
Merge pull request #323 from cimm/remove_unused_script_multisig_example

Script is not used in this example
add contributing.mdwq
Merge pull request #328 from maraoz/add/contributing

add contributing.md
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