Remove changing encoding to BINARY in raw_source
Fix specs

Conflicts:
	lib/jpmobile/mail.rb
Fix to mail 2.5 and later
add receive mail spec

error when mail include au's kigou
fix encode error

Encoding::UndefinedConversionError when jis mail(au mail) include special char
(①, etc)

change base encoding
fix send_mail encode

error undefined method `encoded' for #<String>
because mail-2.5.4 pass encoded message