bumped up amber-dev version
added Amber 0.13.1 as devDep
upd amber_dir; grunt amberc:* OK
new Gruntfile for nodejs exmpl
use ^ in package.json for grunt
node filesystem fs example
extended README
Merge branch 'issue51' into nodejs-examples-to-v13
Merge pull request #60 from hhzl/nodejs-examples-to-v13

Nodejs examples to v13