Adding node-gyp support for node 0.8
drop 0.4 and 0.6, add 0.8 and 0.10
0.4.0
Adding an error for toString instead of segfault if base is out of range.
0.4.1
use NODE_MODULE() macro, required for node.js 0.10.0 (and winblows too)
0.4.2
Merge branch 'master' of github.com:substack/node-bigint