Remove docs from EXTRA_DIST target

Having docs there would cause Doxygen to be run when `make dist`
is run. However, the docs target was removed from the Doxygen target
list, so this was giving me trouble with make dist(check). We probably
don't want to distribute Doxygen stuff anyway and should get around
to setting up the webpage with Doxygen documentation...
Clean up files generated by one of the new tests

This was causing `make distcheck` to get upset.
Propagate required libraries to make distcheck

By default, nothing will get propagated. In theory, when configure
gets run during make check, it will look for LIBMESH_DIR, BOOST_DIR,
etc. However, sometimes I don't have LIBMESH_DIR set, for example,
so this way we can ensure make distcheck will use the required libraries
that we are currently using. Won't bother putting in the optional ones.
Merge pull request #126 from pbauman/distcheck_fixes

Distcheck fixes
GRINS_STAMPED_FILES determined at configure time

This is an alternative to using a GNU make style
to get all the source file names to feed to the
header/license perl script.
Documenting alternative GNU Make style for grabbing files

This is in case the AC_SUBST version breaks and we need to do
something else. In theory, the AC_SUBST version is more portable
because it doesn't rely on GNU Make, but it is relying on some
autoconf foo that wouldn't surprise me if it broke. So, we'll
have this here to fall back on
Don't need those stamped files anymore
We don't need $(top_srcdir) in definition of _SORUCES anymore

This is because we've moved developing the list of source files to
feed the perl script header updater to configure.ac. This is
in preparation for turning on subdir-object
Turn on subdir_objects
Forgot to remove debugging echo
6 lines -> 1 line fix from @roystgnr
2 lines -> 1 line fix from @roystgnr
Merge pull request #127 from pbauman/subdir_objects

Subdir objects