Reorganize vimfiles

Move the majority of the python to an external script. Place the vim
functions in an autoload script. Make the options set in the ftplugin
script buffer local.
Moved python log file to vimscript directory
Add option to show type lookup in preview window
Update README.md
Merge pull request #8 from waedt/vimscript_cleanup

Vimscript cleanup
Update README.md
Merged master