small changes to vimrc
added function and shortcut to easily display all occurances of a search string in the current file using vimgrep
added new plugin indentLine; updated all plugins; updated README.md
removed the indentLine plugin... didn't use it
Added specific syntx highlighting for text files in vimrc, updated the README file; added the .netrwhist to the list of ignored files
Removed .netrwhist from the repository as it is unnecessary.