npm doesn't play well with the symlink bitcore-latest.js. Instead, put the
latest main bundle in bundle.js (which is what it used to be called) so
packages like Copay can use the latest bundle just like how they used to.
In this commit I have added the 'official' versions 0.1.24 and 0.1.25 to the
repo, and also created a new bitcore-dev.js that is not included in the repo.
bitcoin-dev.js is what we will use for development. When we define a new
version, we create a new bitcore-x.x.x.js file, and point bitcore-latest.js to
that. Note that the bitcore-x.x.x.js files should always be the "main" bundle,
which does not include BIP39 or BIP70, or other large packages.