Added directory traversal code
added HScurses test code
curses_test displaying page-at-a-time text
Moved curses test code into pager, and added pagifying code to FileOps
Add a header with the current filename to the paged file
Add a main for testing
removed extraneous test file
Fixed paging bug causing a blank page

Fixed a bug in the pager code that caused a blank page to be displayed before
the pager shut down the tty.
Take a regex as a parameter for files to list

Main.hs now takes a regular expression as an argument, and only shows the files
whose full path matches the PCRE-compatible regular expression
Do line numbering in pager

The pager now adds line numbers to the output. Currently there is a bug where
the line numbers are relative to the current page and not the entire document.
Keep blank lines in pager
Fix bug where you can scroll up into negative line numbers
Highlighter changes