Stockpile and Morph obey slow and disarm
Remove inaccessible morph

Specifically, Racketeer -> Firewalker (disarm does not give XP unlike EMP; also makes no sense)
XP simplification

Don't treat experienced units as more valuable for the purpose of experience
Each rank is making cost once
Morph: XP carries over sensibly

Scaling is now based on relative cost (ie. the new unit has exactly as much XP as if would have if it killed everything the old one did).
Amount of XP carried over is not capped (this means chain morphs are allowed, albeit hard due to previous).
Merge pull request #228 from sprunk/patch-7

Simplify XP and morph
Merge pull request #226 from sprunk/patch-2

Remove an inaccessible morph
Merge pull request #225 from sprunk/patch-1

Stockpile and Morph obey slow and disarm
fix important typo
Merge pull request #229 from sprunk/patch-8

fix important typo