Update README.md
start the refactor to using nan
compiles with nan
passes all nodeunit tests with node v0.10.15
Adding 0.11 to travis.
Upgrading NaN to 1.2.0.

Compiles fine on node 10.29 and 8.x.
2 fixes.
Changing references of ASciiValue to Utf8Value.
Handing v8::Null and v8::Undefined.
Removing memwatch as a dev dependency until it supports node 0.11.
Compiling now with 0.11