Custom ignore templates

[benfreke]

Hi

Thanks for writing this plugin, it's made everything much easier. One thing I'd love to be able to do, and either can't figure out or it doesn't have the option yet, is to create my own gitignore template.

We share projects between both Windows and OS X machines at work, as well as several different IDE's so none of the default templates fits first time. I've cobbled together one that does in about 5 minutes using the provided templates so it's not a major issue at all. But it'd be nice to define a custom template, so when I create a new project I simply select my pre-existing customised gitignore file.

[hsz]

@benfreke Introduced with release 0.7