Add lowercase filter

[mfontani]

In the webapps I'm mostly developing on (written in Perl), the "alternate" templates for controllers (like Web_App::Foo::Bar) are all lowercase (i.e. templates/webapp/foo/bar.tt), and there is no way to make that happen with projectionist currently.

This simple patch allows me to use projectionist on that project, with this config:

{
  "lib/Web_App/*.pm": {
    "alternate": "templates/webapp/{lowercase}.tt"
  },
  "templates/webapp/*.tt": {
    "alternate": "lib/Web_App/{capitalize}.pm"
  }
}

It's a fairly trivial one, granted.

[tpope]

My first impulse is to steer you to snakecase or camelcase. What happens for Web_App::FooBar or Web_App::Foo_Bar?

[mfontani]

Don't really have either – they're all single words ucfirsted, or all caps. snakecase seems to do the trick, indeed.