Set appropriate default paths in configure
Remove unused var holding method name in gracelib
Add working `make install` target
Install mgcollections module
Update documentation for new installation ability
Update doc/authors
Add author-tracking script
Break out author analysis to new project
Ignore changes to mailmap in stats
Add io.findResource method

This method searches with the same machinery used for loading dynamic
modules, but finds a given import path as a real file, returning a
platform-dependent path to the resource.
Add 'imports' module providing resource loading

imports.loadResource(path) will map the extension on path to a handler,
which will be used to interpret the path into an object. Handlers are
registered using imports.registerHandler(extension, handler) where
handler is an object containing a loadResource(path) method. By default
a "txt" handler is defined, returning a string.
Add String.startsWith method