More SpAMMPack updates.
The code is not using the SpAMM_Exit() interface.

strange...
Added max-norm to quadtree.
Small bugfix in makefile.
Updated spamm_get_time to give finer grained time.

get_time is using getrusage() now which claims to have a resolution of micro
seconds.
Making 2048x2048 matrix.
Added more documentation.
Added LA-CC to documentation.
Added another timer to library (SpAMMPack).

getrusage() measures time across all threads, while gettimeofday() measures
walltime.
Added command line option to matrix make script.
Added future option for different random matrix types.
Fixed bug in spamm_exit().
Added more OpenMP tests.
Some smaller changes.
Fixed makefile in tests.
Added another scaling test.
Added additinoal compiler flag for Intel compilers.
Added more tests for SpAMMPack
Added repeat counter in SpAMMPack tests.
Write all test output into one file for processing.