New commands to add search results to the existing results. New
Grep_Xargs_Options variable to control the options passed to xargs.
Don't echo newlines before running the commands.
Support for expanding file and directory names in the search prompt. Fix for recursively searching for filenames with space characters in the name using find and xargs.
1. Add the search pattern to the search results.
2. Support for the -h argument to the commands.
3. Make the plugin work in Vi-compatible mode.
4. Updated documentation.
