Use hash lookup instead of case statements
Merge pull request #46 from protobuf-ruby/ts-faster-wire-selection

Use hash lookup instead of case statements
Limit the build status image to master branch

Don't scare people if the latest feature branch build is failing.
Test that encoding an unknown field fails silently
use 1.8-compatible syntax
Merge pull request #49 from protobuf-ruby/bk-test-unknown-field

Test that encoding an unknown field fails silently
remove redundant tests
Merge branch 'master' into bk-decode-memory

Conflicts:
	test/buffer_encode_test.rb