V0.18 2015-01-01

• align with handlebars.js 2.0.0
• 7bcce4c support {{@last}} for {{#each}} on both object and array
• b0c44c3 remove ending \n in lightncandy.php
• e130875 support single quoted string input: {{foo 'bar'}}
• c603aa3 support renderex to extend anything in render function
• f063e53 now render function debug constants works well in standalone mode
• 53f6a68 fix parsing bug when there is a = inside single quoted string
• 2f16c0c now really autoload when installed with composer
• c4da1f5 supports {{^myHelper}}