Add cheaper, hitech static solar panel.
Massive tech tree overhaul

- Changed description of a bunch of nodes
- Repurposing the Construction subtree for hydrolox engines (FIXME write
a patch to move anything using it, on BEFORE[RP-0], to the Precision
Engineering node or the science/capsules/electricity subtree
- Swapped Enhanced Survivability and Science Tech in position
- Moved Orbital Surveys back to be child of Science Tech
- Changed SciTech's reqs to both Surv and Stab
- Changed electrics to only depend on Sci Tech
- Moved parts in tree and engine configs as appropriate.