Issue #56 Pull in the Lua 5.2 os.date() fixes
Add %Z into the Windows strftime specifiers
Merge pull request #57 from mozilla-services/issue_56

Issue #56 Pull in the Lua 5.2 os.date() fixes
Only add a metatable to libraries if one doesn't already exist
Fix the unit test assertions.
Merge remote-tracking branch 'upstream/dev' into haproxy-grammar
Merge branch 'haproxy-grammar' of github.com:davidbirdsong/lua_sandbox into haproxy-grammar