v0.3.2

• Bugfix for tail-calling uncallable values. Fixes internal panics.
• Major bugfix for finalization, make sure to transition the collector
  immediately to Collecting after finalization is done. Fixes lost Thread
  finalization and unclosed upvalues.
• Make the type builtin match PUC-Rio Lua by @Jengamon.
• Fix Lua stack corruption during tail calls with less arguments than expected.
• Make function statements act like local / upvalue assignment when appropriate.
• Fix math.random and math.log to better match PUC-Rio Lua by @Jengamon.
• Fix select to better match PUC-Rio Lua by @Jengamon.
• Implement math.randomseed by @Jengamon.
• Let __index and __newindex chain through UserData in addition to
  Table.
• Implement "dead keys" to make table iteration behavior match PUC-Rio Lua.
• Implement gc_arena::Collect for piccolo_util::UserDataMethods and
  piccolo_util::StaticUserDataMethods.
• Implement string.sub, string.lower, string.upper, string.reverse by
  @Jengamon.
• Better match PUC-Rio Lua behavior with longstring newlines.

Full Changelog: v0.3.1...v0.3.2