Mining update

This is update to mining fixing Ripley mech being useless in mining and adding a working plasma cutter.
* Advanced mesons added to RnD. This is basically mesons + ore scanner + a bit of night vision.
* Reduced cost and tech levels for regular mesons in RnD.
* Ripley's armor buffed a bit.
* Ripley's speed increased a bit.
* Ripley's equipments slots increased from 3 to 6 so you can attach a ton of tools to it.
* Advanced mesons added as visor to Ripley. 
* Plasma cutter can fire plasma blasts and dig up to 4 tiles in line. Uses plasma ore, sheets and liquid plasma as ammo.
* Plasma cutter added to mining tools vendor
* Advanced plasma cutter added to RnD.
* Mech plasma cutter added to mech fabricator.