added unix tricks list and a function from it to .functions:
Merge branch 'master' of github.com:jlank/dotfiles

* 'master' of github.com:jlank/dotfiles:
  added git gutter to vimrc and node_modules to gitignore
  just added a clarifying comment
  Updated .bashrc with a comment to try out prose
  remove rvm sourcing and undo directives in vimrc
  fixed coffee alias
  added highlighting syntax for ejs files
  added delete empty line function to vimrc
  fixed vimrc undofile
  added rvm sourcing to extras
  added undofile to vimrc to keep undo history between opening and closing files