added files from https://github.com/jrnold/stan-mode and updated README.md.
require compile

fix bug: Symbol's value as variable is void: compilation-error-regexp-alist
cleaned up headers
adding Daniel's email address, updating version to match Stan version
updating version to match Stan version
updating match of stan bounds
updating regex for stan-types
split functions into functions, pdfs, and cdfs
adding license file
reverted stan-mode version to 1.0.0; and added stan-language-version variable
Merge pull request #1 from stan-dev/dev

version 1.0.0