next = function() {
				if (fileList.length) {
					var f = fileList.shift();
					reader(f, function(err, content) {
						if (err) {
							logger.log('Unable to read "' + f + '" file: '+ err);
							return next();
						}
												
						switch (file.getExt(f)) {
							case 'js':
								try {
									eval(content);
								} catch (e) {
									logger.log('Unable to eval "' + f + '" file: '+ e);
								}
								break;
							case 'json':
								var fileName = getFileName(f).toLowerCase().replace(/\.json$/, '');
								if (/^snippets/.test(fileName)) {
									if (fileName === 'snippets') {
										// data in snippets.json is more important to user
										userSnippets = utils.parseJSON(content);
									} else {
										payload.snippets = utils.deepMerge(payload.snippets || {}, utils.parseJSON(content));
									}
								} else {
									payload[fileName] = content;
								}
								
								break;
						}
						
						next();
					});
				} else {
					// complete
					if (userSnippets) {
						payload.snippets = utils.deepMerge(payload.snippets || {}, userSnippets);
					}
					
					that.loadUserData(payload);
				}
			}
Loads Emmet extensions. Extensions are simple .js files that
uses Emmet modules and resources to create new actions, modify
existing ones etc.
@param {Array} fileList List of absolute paths to files in extensions 
folder. Back-end app should not filter this list (e.g. by extension) 
but return it "as-is" so bootstrap can decide how to load contents 
of each file.
This method requires a <code>file</code> module of <code>IEmmetFile</code> 
interface to be implemented.
@memberOf bootstrap