null-safe error extraction
make globals work for subclasses
fix: root object must allow custom servicePath
allow nested output files; remove version number in library name
make base entity library prefix more unique
add pub-server to .gitignore
fix conversion of API names to Dart identifiers
fix reference to wrong request var in impl.dart
Merge pull request #233 from yjbanov/sync-v0.2

null-safe errors; global in subclasses; servicePath fix; nested files; version in library name