Revert "Patch from Matt to add global include paths."

Revert "Patch from Matt to add global include paths."

A few problems here.

Merge removed some code in random files, notably introducing a leak in
Seed.print.  Mixes style changes with code changes. Makes seed_include
leak in error conditions. Default path (examples) doesn't make any
sense. The error handling is somewhat inconsistent ("Cannot open path
entry") exception probably shouldn't exist.