detailed error message about unattributed input being converted
imports are unattributed even after typechecking so we need to relax our validator
offenders are now printed out together with their parents
a small refactoring
more information in printouts
patmat wildcards never have symbols so we need to relax our validator once again
better error reporting for exceptions thrown during conversion
deduplicated try/catch blocks: they were significantly slowing down compilation
looks like shorter and dumber error reporting is better

nested exceptions were really polluting the stack trace
simplifies the sbt build
fixes template parent conversion errors

1) Apparently trees in Template.parents aren't TypeTrees (surprise!)
2) Can't set a symbol on a TypeTree (just ignoring it at the moment, need to think where to put it)
better support for incremental testing
fixes ThisType conversion errors
i did it: programmatic emulation of cmd+k
reverses the introduction of catchAndReportExceptions

Back then having a bunch of try/catch blocks in different functions
significantly slowed down the compilation, but:
1) That's only relevant to -optimize
2) Having catchAndReportExceptions + a closure for every convertion
stack frame very much pollutes the stack trace
a bit more precise logging
evicts all deprecations
shuts up the assembly plugin