Fix classifications in setup.py

Merge pull request oemof#766 from oemof/release/v0.4.3

Release/v0.4.3

Merge pull request oemof#760 from oemof/fix/exclude-problematic-pyomo…

…-version

Exclude pyomo version that causes a too long computing time

Prepare v0.4.1 release

Merge branch 'dev' of github.com:oemof/oemof-solph

Move long description

Exclude builds from repository

Merge pull request oemof#604 from oemof/release/v0.3.1

Release/v0.3.1

Merge pull request oemof#599 from oemof/dev

Release v0.3.0

Adapt version number