Add monero_add_minimal_executable and use in tests
This is done in order not to have to relink targets, when just an .so changed, but not its interface.
- choice where to enter passphrase is now made on the host
- use wipeable string in the comm stack
- wipe passphrase memory
- protocol optimizations, prepare for new firmware version
- minor fixes and improvements
- tests fixes, HF12 support
- tests fixes for HF10, builder change, rct_config; fix_chain
- get_tx_key test
- proper testing after live refresh added
- live refresh synthetic test
- log available funds for easier test construction
- wallet::API tests with mocked daemon
Dusan Klinec