NDN Browser Shim

ndn browser shim is a brute force packaging of UCLA's NDN-js into a browserifieable npm module. Concerns:

Many Crypto libraries used in the context of globally exposed variables

Custom Buffer class normally gets overridden by node buffer browserify module

require calls from previous attempt at browserifiability fail when requiring the compiled library

remove all calls and definitions of require

if require calls a node module instead of a local file, replace with 'ndn'

build ndn.js with security libs

in addition to replacing the var Buffer function definition, global replace:

export the new ndnbuf class so it can be accessed by ndn.ndnbuf