self-instantiated main class/function

No need to use `new NwBuidler(opts)`, simply `NwBuidler(opts)` will do.
gulpfile: update

Fixes an issue with node-webkit notifications -- https://github.com/rogerwang/node-webkit/issues/27#issuecomment-49324673
Update Gulpfile.js
Added gitattrs
Merge pull request #84 from clooth/master

Added .gitattributes file to fix line ending problems
Flat badges
Copy nw locales
Added color to tests output
Bumped to tape 3.0.1
Added .editorconfig
Added CONTRIBUTING.md
Merge pull request #93 from y-lohse/patch-1

Copy nw locales
Merge pull request #80 from yoshuawuyts/patch-1

gulpfile example: plist bundle identifier change
Added note about ulimit

Because of mllrsohn/grunt-node-webkit-builder#103
0.1.4
fix for building <=0.9.2

0.9.2 and below do not include the locales folder.
Merge pull request #97 from technicallyjosh/master

fix for building <=0.9.2
Added support for platform-specific manifest overrides

0.9.2 and below do not include the locales folder.
Merge pull request #99 from mllrsohn/platform-overrides-2

Support for platform-specific manifest overrides
0.2.0