Update lib/linguist/languages.yml

Add DOT language: http://www.graphviz.org/content/dot-language
Update lib/linguist/languages.yml

Add .gv (GraphViz) file extension to DOT language.
More Forth samples.
Update lib/linguist/languages.yml

Change sort order
Update lib/linguist/languages.yml

Set lexer to Text only for DOT. This hopefully fixed the failure on Travis.
Add NSIS installer scripting language
Add .nsh extension
Merge pull request #363 from dveeden/master

Add DOT language
Merge pull request #391 from bfontaine/forth-samples

More Forth samples
Merge pull request #423 from gentoo90/nsis-lexer

Add NSIS installer scripting language
Don't include .inc.

Format is used by too many other non lasso repos
Update samples database
Bump to 2.6.7