add licence terms
Colorize lines and folder names
Don't grep symlinks
Handle any number of spaces in the file name

Fixes #19
Add argument to search by filetype

examples:
	ngp -t c
	ngp -t sh
implement is_file() function
implement is_dir_good() function
init colors only at ncurses init

Instead of at each printl call
add green color and use it for file prints
check if .ngprc is in home directory
implement raw mode

This let us parse a directory in raw mode
in which there is no extensions filtering.
remove whites spaces
run autoreconfig with COPYING
Move symlink detection to separate function

Code is more readable that way.
Warn that no conffile has been found

Prviously only displayed an obscure error message
If line is a folder, skip it