Adding a developer section to the README

[Stefan Sauer]

hi,

I wanted to take a look at some of the pending PRs. So I did these steps:

> git clone https://github.com/google/code-prettify.git

> cd code-prettify

> npm install

> grunt

Loading "compress.js" tasks...ERROR

>> SyntaxError: /home/ensonic/projects/lego/code-prettify/node_modules/grunt-contrib-compress/node_modules/pretty-bytes/index.js:2

>> const UNITS = ['B', 'kB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];

>> ^^^^^

>> Use of const in strict mode.

Warning: Task "compress" not found. Use --force to continue.

Aborted due to warnings.

DId I miss anything? 

The error above is a bit weird since the task is registered in the Gruntfile.js and also installed:

> ls -1 node_modules/

google-closure-compiler

grunt

grunt-contrib-clean

grunt-contrib-compress

grunt-contrib-copy

grunt-contrib-cssmin

grunt-contrib-uglify

grunt-preprocess

html-to-text

zombie

Once it works I can send a PR to add some info to the README. Also would it be interesting to go through the PRs and review/merge them? I could dedicate some time for this.

Stefan

[Stefan Sauer]

I figured it out. My nodejs was too old. Therefore it tried to build grunt-contrib-compress from scratch and that failed.

Stefan