allowing sign keys to be strings

no need to pass array of one element to sign a transaction, you can simply pass the private key string (one or more separated by commas) and convert it to array. make user's life easier :)
upgrade to new version of bn.js that includes hex padding
Merge pull request #550 from eordano/fix/allowsignstring

allowing sign keys to be strings
Merge pull request #552 from braydonf/bn-hex-padding

upgrade to new version of bn.js that includes hex padding
fix browser test
Merge pull request #555 from maraoz/fix/browser-test

fix browser test
bump version
Merge pull request #556 from maraoz/version/0.1.40

bump version
serialize only the list of selected utxos, if available
Merge pull request #562 from matiu/feature/txbuilder-utxos

serialize only the list of selected utxos, if available
remove whitespace, add js language identifiers
add lang identifiers to examples.md with gulp
Adding more detailed logging  with host and port when there are RPC connection issues
Merge pull request #568 from heath/fix/language-identifiers

remove whitespace, add js language identifiers
Merge pull request #589 from phutchins/master

Adding more detailed logging  with host and port when there are RPC conn...
v0.1.41
Merge pull request #628 from maraoz/version/0.1.41

v0.1.41