Allow overlapping static and catchall routes

[ibraheemdev]

• routes like /*foo and /bar are now allowed to overlap, with /bar prioritized (#18)
• the route /foo/ no longer matches /foo/*bar, and is allowed to exist on it's own
• route parameters for catchall routes no longer include the /, e.g. /foo.js will match /*filepath with a value of foo.js, not /foo.js
• Error::MalformedPath was removed in favor of Error::InvalidCatchAll