Add running spec feature of rspec-mode

Signed-off-by: Shin-ichiro OGAWA <shinichiro-ogawa@cookpad.com>
Add ruby-end

Signed-off-by: Shin-ichiro OGAWA <shinichiro-ogawa@cookpad.com>
Use helm for yasnippet

Signed-off-by: Shin-ichiro OGAWA <shinichiro-ogawa@cookpad.com>