Isolate scope for constant template

[leandrocrs]

Use John Papas guide recommendation and isolate scope for constant.

[guzart]

Hi, first of all thank you for your PR.

I added a options.wrapHeader and options.wrapFooter in the 2.0.0-1 pre-release that I think would make it easier to customise the output, let me know what you think?

Do you have a link to where in the style guide is the ;(function(){ header? I would like to set the defaults to match the style guide.

Thanks

[Cordobo]

I guess @leandrw refers to https://github.com/johnpapa/angular-styleguide/blob/master/a1/README.md#style-y240

without the first ; which one can accomplish with options.wrapHeader and options.wrapFooter or, if I remember right, wrap: true.

Just for reference:
I set wrap: false (I already have a gulp task for the IIFE) but I wanted to add 'use strict'; to the generated file viaoptions.wrapHeader, which did not work :) I solved it by using my own template:

'use strict';
angular.module('<%- moduleName %>')
<% constants.forEach(function(constant) { %>${indent}.constant('<%- constant.name %>', ${constant.value})<%= _.last(constants) === constant ? '' : '\n' %><% }) %>;

This solved another issue with the empty deps [] as well, as I already had the angular module declared in a separate file.

Update: Typo