Engine core refactoring with improved scheduling.

meta.py

 # Meta
-__version__ = '0.6.1'
+__author__ = "David Trattnig and Gottfried Gaisbauer"
+__copyright__ = "Copyright 2017-2020, Aura Engine Team"
+__credits__ = ["David Trattnig", "Gottfried Gaisbauer", "Michael Liebler"]
 __license__ = "GNU Affero General Public License (AGPL) Version 3"
+__version__ = "0.6.1"
 __version_info__ = (0, 6, 1)
-__author__ = 'David Trattnig <david.trattnig@subsquare.at>'
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+__maintainer__ = "David Trattnig"
+__email__ = "david.trattnig@subsquare.at"
+__status__ = "Development"
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