Added photosynthesis, a chloroplast organelle, and environmental CO2 emitters.

Notes:
- Chloroplast organelle is placed in editor with hotkey [P]
- Water and sun are everywhere, so photosynthesis only requires CO2
- New OrganelleFactory streamlines microbe creation and modification
- definitions are now on the git repo
Merge pull request #172 from Revolutionary-Games/146-photosynthesis

Photosynthesis added. This also involves a refactor to how organelles are created, they now use factory for normalized creation.