Added test to check that version is defined
Fixing spelling mistake in method name
Testing basic functionality
Tests for exception situations
Testing module work before first pass_milestone()
New methods serialize() and spawn(). And tests.
New method get_elapsed_seconds()
Metod with ugly name renamed to can_calculate_eta()
Moved method can_calculate_eta() in source code
Method pass_milestone() now dies if everything is done
POD for methods
Written SYNOPSIS and DESCRIPTION section in POD
Writing about version 0.01 in Changes