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module.exports = function(opts){
    var fs = require('fs')
        ,md5 = require('MD5')
        ,_ = require('underscore')
        ,cache_helper = {}
        ,settings = _.extend({
            cache_dir: __dirname + '/cache/'
        }, opts || {})
        ,timenow = function(){ 
            return (new Date()).getTime();

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//border radius, takes any acceptable border-radius string
.border-radius(@rad){
    border-radius: @rad;
    -moz-border-radius: @rad;
    -webkit-border-radius: @rad;
}

//round top corners
.border-radius-top(@rad){
    .border-radius(@rad @rad 0 0);

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_.mixin({
  slugify: function(title){
    var replace = '-';
    var str = title.toString()
          .replace(/[\s\.]+/g,replace)
          .toLowerCase()
          .replace(new RegExp('[^a-z0-9'+replace+']','g'), replace)
          .replace(new RegExp(replace+'+','g'),replace)
        ;

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// remove key from object
_.mixin({
    remove: function(obj, key){
        delete obj[key];
        return obj;
    }
});

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//get a key from an object if it exists, otherwise use default
_.mixin({
    get: function(obj, key, default_val){
        if (obj && _.has(obj, key)){
            return obj[key];
        }
        else{
            return default_val != undefined ? default_val : '';
        }
    }

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//this replace method can take multiple finds and one or multiple replacements at a time
//if find is an array, replace will be called on every find
//if replace is an array, the indexes must match with find to do replacements.
//if replace is a string, it will be used for all replace calls if find is an array
//if find and replace are both strings, this will simply mimmick a normal str.replace(find, replace) call
//the result of all replacements will be returned at the end
_.mixin({
  replace: function(str, find, replace){
    //if str is null, just give up now
    if (str === null){

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Date.format = function(d, format, custom_months, custom_days){
	var months = custom_months || ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December']
		,days = custom_days || ['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday']
		,replacements = [
				//day
				[ '%d', (d.getDate() < 10 ? '0' : '') + d.getDate() ] //leading 0: 01-31
			,	[ '%D', days[ d.getDay() ].substr(0, 3) ] //3 letter representation (Mon-Sun)
			,	[ '%j', d.getDate() ] //no leading 0: 1-31
			,	[ '%l', days[ d.getDay() ] ] //[lowercase L], full textual representation (Monday-Sunday)
			,	[ '%N', (d.getDay() + 1) ] //day #: 1-7 (1=monday, 7=sunday)

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h1 Page Title
p This is a sentance, woo!