bitc: ncurses based SPV bitcoin client, 100% C code

[fnsa]

bitc is a thin SPV bitcoin client.

  * 100% C code,
  * support for linux and mac platforms,
  * console based: uses ncurses,
  * home grown async network i/o stack,
  * home grown poll loop,
  * home grown bitcoin engine,
  * supports encrypted wallet,
  * multi-threaded,
  * valgrind clean.

  WARNING: this app is under development and may contain critical bugs.