Fix struct encoding

There was accidentally an extra empty dict.  Also, reduce the scope of a
local variable.
Merge pull request #15 from dgryski/encode-struct-extra-dict

Fix struct encoding
Implement r opcode LONG_BINPUT
Add test for LONG_BINPUT opcode
Merge pull request #16 from Sean-Der/master

Implement r opcode LONG_BINPUT
Merge branch 'master' of https://github.com/kisielk/og-rek into tweaks

Conflicts:
	ogórek_test.go