fix big integer case.

[jeanbone]

use lossless json with decimal to unmarshal & marshal big integer object.

[mobz]

Hi This looks like an interesting solution to a problem many people have. Your PR has a few issues;

• The _site directly is generated from the src directory - your changes need to be in the src directory also. You should set up the development toolchain as per instructions.
• There also needs to be a build step to move the dependencies from node_modules into the _site directory - so the repo can be checked out clean and built. Alternatively copy decimal and lossless json into the vendor directory and do no use npm.

Let me know if you need more help with this.