Add npm install step for developing Wiki 

Without it, grunt won't be installed locally and will fail to build.
fix sinon to latest working version (1.7.1)
update mocha to 1.12.1
remove script files no longer required
Merge pull request #18 from Gui13/patch-1

Add npm install step for developing Wiki
Merge pull request #22 from paul90/fix-runtest

Peg sinon version, and update mocha
npm version 0.0.4
Farm starting comment
Merge branch 'master' of https://github.com/WardCunningham/wiki