Update README.md

Change profit to item.profit in first example
Merge pull request #1 from evanp/patch-1

Update README.md
Typo
Fixed syntax error
added gitignore
removed jison
removed filtrex.js
convert project to work with npm
adapt tests to run from shell
makefile; build UMD module with browserify/uglify
package.json
minified version
Pre-generate parser
parser pre-generation means jison is now only a development dependency
Merge branch 'master' of github.com:jaz303/filtrex into jaz303-master