swaped 'unknown byte' and 'MOPP Data'; renamed 'unknown byte' to 'Build Type' as enum
Merge pull request #10 from skyfox69/feature/buildType_and_correct_MoppData

bhkMoppBvTreeShape and Build Type
added issue #7 from abies into nif.xml considering suggestion from ttl269 and neomonkeus
Merge pull request #12 from skyfox69/feature/issue7_explanations_for_shaders

Tested with several Skyrim vanilla nifs containing effects and it looks ok. Also got load errors when using "!=0" syntax, so agree to use old syntax.