Argument parsing and array allocation.
Changed return code for argument parsing.
Calloc return error checking.
Matrix initialization function.
Code style.
WIP on multiplication and tests.
WIP on makefile rules.
Changed make rules for test to compile properly.
Fixed tests.
Multiplication implemented and tests working.
Multiplication in parts implemented.
Added compiler optimization flags.
Implemented timestamps.
Removed parallel.h and sequential.h files.
They are not needed.
Added microseconds to timestamp.
Free args struct.
Beginnings of parallel implementation.
Added argument checking.
Newline after matrix print.
Added seed argument 'k'.