* Add credit-only flag to AccountMeta, default to false
* Sort keys by is_credit_only within signed/unsigned groupings
* Process and de-dupe program keys along with other account keys
* Add message helper functions
* Fix test
* Improve comment
* s/is_credit_only/is_debitable
* Add InstructionKeys helper struct, and simplify program_position method
* Rename programs to instruction_processors
* Updates around the code base to support instruction_processors rename
* Kabab instruction_processors
* Update Cargo.toml files and scripts to use instruction-processors
* Update Cargo.toml to use instruction-processors
* Update CI scripts to use instruction-processors
This will allow BankClient to spin up a thread to use the Bank.
It'll also ease the transaction from BankClient to ThinClient since
it won't let you depend on Bank.
Drawback, you the transition from Bank to BankClient will be harder
because the Bank methods are inaccessible.