Breaking changes due to oemof.network v.0.5.0

[nailend]

Especially due to making kwargs explicit in node (oemof.network) tabular facade is failing.

Error example:

TypeError: Node.__init__() got an unexpected keyword agument 'type'

Adhoc fix:
Manually downgrade oemof.network to version v.0.5.a5 with pip install oemof.network==0.5.0a5

[henhuy]

We must integrate adapted oemof.solph version into tabular to fix errors.
See https://github.com/oemof/oemof-solph/pull/1032/files#diff-4f7f20450aa0f053f4416d7e78ec5e7476a9c8d863c9da0bcc5e8a3028227ce9
for changes in solph (i.e. explicit balanced parameter in Bus node)

[nailend]

@Bachibouzouk these are the main changes holding us back up upgrade to current solph 0.5.2. Probably not to bad, but I just hadn't time to properly look into it...

[nailend]

@Bachibouzouk, @henhuy sorry, due to no more time, I won't be able to fix this