Working on issue https://github.com/Mischback/django-oweb/issues/7

Created necessary files
Created template

Yeah, and working on the engine... but basically boring stuff
Successfully transferred energy tool to new implementation

Needs some styling, though...
styling of energy tool
Merge branch 'feat_tool_energy' into development

Issue https://github.com/Mischback/django-oweb/issues/7 done