Re:Hoverpod project
 - Adds hoverpod.dm with complete functionality. Does not have ion trails, novelty aspect.
 - Adds new equipment; the rigged laser and the passenger compartment. mecha/weapons/weapons.dm has been adjusted accordingly.
 - Currently, the hoverpod can only be acquired through cargo due to mech_fabricator.dm issues.
Updates changelog.html
Merge branch 'dev' of https://github.com/Baystation12/Baystation12 into exo-pods