add Signer and Types capnp schema
cleanup cppForSwig/Makefile.am

rename Armory::Signer namespace to Armory::Signing

Clean bridge pr

 - implement combined balance fetch
 - populate spender hash in Output where applicable

pass all supernode tests

fix notifications in bridge & python
fix wallet loading in ArmoryQt
fix ledger fetching & display
fix startup sequence

fix address book rendering

implement fee schedule fetch, fix rendering

Capnp bridge fix

remove unnecessary compiler switch to Windows headers as a result
do not wantonly import windows.h in headers (creates trouble when winsock2.h has to be imported)
get rid of obsoleted win32_posix code