Contributing section in Readme
match http:// and https:// assets

this could be also something like that `http[s]?://`
remove whitespace in handlebars expressions

Minor - consolidate syntax style
Merge pull request #39 from m5o/contributing-readme

Contributing section in Readme
Merge pull request #41 from m5o/handlebarsjs-syntax

remove whitespace in handlebars expressions
Merge pull request #40 from m5o/include-http-https-assets

match http:// and https:// assets