encryptrpak 0.2.0

• get_private_key_path() and get_public_key_path() are now exported functions.
• An argument called devtools_load was added to get_private_key(), get_public_key(), get_private_key_path(), get_public_key_path(), encrypt_extdata(), and decrypt_extdata(). This allows developers to load packages to memory before running the functions. The devtools_load argument is always set to FALSE.