GNUmakefile: mocha, pegjs default to local install

they defaulted to global installs (or rather, $PATH),
which has all kinds of drawbacks, like not working
after plain npm install in a studio_snatch checkout;
npm install -g requiring root privileges; etc.

with this change, the following works:

  git clone .../studio_snatch.git
  cd studio_snatch
  npm install
  make

coffee(1) (see bin/ssnatch shebang) remains for now.
GNUmakefile loses the waves target

it was stale anyway: first argument to bin/ssnatch
is the studio server url.
GNUmakefile grows bootstrap, npm-install targets
GNUmakefile grows run target

make run against=http://user:pass@host[:port]
README instructions updated, simplified
report errors from fs.unlink, fs.writeFile
routes parse into an array of objects

previously array of triplets.
creates response directory if needed

the path is still not configurable.
logs UTC dates
README: Overview, Requirements, Inputs, Outputs