Rename bitcoin-tx to zcash-tx

Closes #1565

src/Makefile.am

@@ -66,7 +66,7 @@ if BUILD_BITCOIND
 endif
 
 if BUILD_BITCOIN_UTILS
-  bin_PROGRAMS += zcash-cli bitcoin-tx
+  bin_PROGRAMS += zcash-cli zcash-tx
 endif
 
 LIBZCASH_H = \
@@ -393,17 +393,17 @@ zcash_cli_LDADD = \
   $(LIBZCASH_LIBS)
 #
 
-# bitcoin-tx binary #
-bitcoin_tx_SOURCES = bitcoin-tx.cpp
-bitcoin_tx_CPPFLAGS = $(BITCOIN_INCLUDES)
-bitcoin_tx_LDFLAGS = $(RELDFLAGS) $(AM_LDFLAGS) $(LIBTOOL_APP_LDFLAGS)
+# zcash-tx binary #
+zcash_tx_SOURCES = bitcoin-tx.cpp
+zcash_tx_CPPFLAGS = $(BITCOIN_INCLUDES)
+zcash_tx_LDFLAGS = $(RELDFLAGS) $(AM_LDFLAGS) $(LIBTOOL_APP_LDFLAGS)
 
 if TARGET_WINDOWS
-bitcoin_tx_SOURCES += bitcoin-tx-res.rc
+zcash_tx_SOURCES += bitcoin-tx-res.rc
 endif
 
-# FIXME: Is libzcash needed for bitcoin_tx?
-bitcoin_tx_LDADD = \
+# FIXME: Is libzcash needed for zcash_tx?
+zcash_tx_LDADD = \
   $(LIBBITCOIN_UNIVALUE) \
   $(LIBBITCOIN_COMMON) \
   $(LIBBITCOIN_UTIL) \
@@ -412,7 +412,7 @@ bitcoin_tx_LDADD = \
   $(LIBBITCOIN_CRYPTO) \
   $(LIBZCASH_LIBS)
 
-bitcoin_tx_LDADD += $(BOOST_LIBS) $(CRYPTO_LIBS)
+zcash_tx_LDADD += $(BOOST_LIBS) $(CRYPTO_LIBS)
 #
 
 # zcash protocol primitives #