adding Lasso language and sample files
Lasso extentions sorted
Lasso lexer name added
Add more samples with listed extensions.  Remove extension specification.  Clarify comments at top of languages.yml.
Added Handlebars language
Don't explode on invalid shebang
Added Elm.
added php cli samples
fixed typo
Merge pull request #305 from DominikTo/php-cli

Fixed detection of PHP CLI scripts (added samples)
"xhtml" ☞ HTML
"erb" ☞ RHTML
"make" ☞ Makefile
"obj-c/objc" ☞ Objective-C
"obj-j" ☞ Objective-J
"latex" ☞ TeX
"rss/xsd/xsl/wsdl" ☞ XML
"yml" ☞ YAML
add HTTP language

Useful for `curl -i` dumps. Had to add primary_extension although this
data is usually not saved in files, but shown as code blocks.
Forcing travis check