verify that published tx are accepted by peers

recommend rescan when an apparently valid send with all inputs confirmed is rejected

Adding multipeer manager & user selection components.

Adding peer-validity checks, finalizing components of multi-peer implementation.

Coding style typo & disabling noisy manager

Changing peerservicetype to bitmask for advertising arbitrary combination of services.

Conditionally compiling multi peer code. Left code to satisfy interface builder setup.

Updating UI messages and fixing multi peer framework exception by turning state mask value into a string.