added a process methods to FileServer and ReplacedFile to handle .php
files.  Made all but the .serve method work on absolute paths. Added
in the hack that will cause files with .php to get processed and all
others to be served up straight.  Added checkPath (and an associated
cache) to see if the requested file exists.  If it points to a
directory, do the append index.[php,html] check to see if that exists.
get rid of trailing slash on BASEPATH.  Include sync.js for Synchronizers.
make assert a class method of Util.
start adding css
start creating a real page.
initial add
initial add
add in the function to format posts for the {posts} key
include post class
simple css for showing all posts on a single page.