add bitcoinjs-lib 0.1.3 and 0.2.0

(note: edited to reflect directory normalization step)

While bitcoinjs-lib is available through npm, as of 0.2.0 it requires a compile script to produce file suitable for browser use, which the auto update script does not appear to support. I did the build as follows:

    git clone https://github.com/bitcoinjs/bitcoinjs-lib.,git
    cd bitcoinjs-lib
    git checkout tags/0.2.0
    npm install
    npm run-script compile
    perl -i -pe 's!/home/[a-zA-Z0-9_/\.-]+/bitcoinjs-lib!/BUILDROOT/bitcoinjs-lib!g' bitcoinjs-min.js

which produces bitcoinjs-min.js with sha256

0cbd0d527360bc7fb8c38c7efd2b25c7acaa8ffa93b2e646e983eb760e6b496a

or, with all newlines stripped (tr -d '\n' < bitcoinjs-min.js | sha256sum),

1e88b7acd345f33a3e79decc65960d56082b2764163480bd05f7de7f17843f29

0.1.3 includes pre-built bitcoinjs-min.js and bitcoinjs-exit-min.js, which I have simply copied from the build directory in bitcoinjs-lib after checking out that tag:

    git checkout tags/0.1.3

npm test runs without error.