Moved non-Melpa github sourced packaged to a from-git folder
Modified `after-save-hook' to convert modes of scripts to executables automatically
Modified the key-chord bindings. Added alternative keybindings to reduce
use of top row of the keyboard: Esc and Fn keys
Added a tip on how to insert superscripts
Added the from-git dir as one of the sources of emacs packages
Enable syntax highlighting of .vim* files
Move the require for popwin to the top as other packages might depend on it