jtorctl: Throw checked exceptions instead of unchecked exceptions

jtorctl throws unchecked RuntimeExceptions if it receives an error response or malformed response from Tor - users of the library have to catch these without being warned by the API. This patch converts jtorctl's RuntimeException subclasses into IOException subclasses. This is safer for users of the library and better conveys what's happened (an IO error).

Trac:
Username: akwizgran

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information