Add main resource files

* apitest.properties - config file for customizing ApiTestConfig
  options

* logback.xml - logging config file, will override logback files
  found in classpath

* bitcoin.conf - bitcoin-core regtest config file, overwritten
  during startup with correct path to blocknofity

* blocknotify - bitcoin-core blocknotify config file

apitest/src/main/resources/bitcoin.conf

@@ -0,0 +1,16 @@
+# This file is overwritten by ApiTestConfig.java at startup, to set the correct blocknotify script path.
+regtest=1
+
+[regtest]
+peerbloomfilters=1
+rpcport=18443
+
+server=1
+txindex=1
+
+# TODO migrate to rpcauth
+rpcuser=apitest
+rpcpassword=apitest
+
+# The blocknotify path will be defined and at runtime.
+# blocknotify=bash ~/.bitcoin/blocknotify %

apitest/src/main/resources/blocknotify

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+# Regtest ports start with 512*
+
+# To avoid pesky bitcoind io errors, do not specify ports Bisq is not listening to.
+
+# SeedNode listens on port 5120
+echo $1 | nc -w 1 127.0.0.1 5120
+
+# Arb Node listens on port 5121
+echo $1 | nc -w 1 127.0.0.1 5121
+
+# Alice Node listens on port 5122
+echo $1 | nc -w 1 127.0.0.1 5122
+
+# Bob Node listens on port 5123
+echo $1 | nc -w 1 127.0.0.1 5123
+
+# Some other node listens on port 5124, etc.
+# echo $1 | nc -w 1 127.0.0.1 5124

apitest/src/main/resources/logback.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <!--
+    The :daemon & :cli jars contain their own logback.xml config files, which causes chatty logback startup.
+    To avoid chatty logback msgs during its configuration, pass logback.configurationFile as a system property:
+        -Dlogback.configurationFile=apitest/build/resources/main/logback.xml
+    The gradle build file takes care of adding this system property to the bisq-apitest script.
+    -->
+    <appender name="CONSOLE_APPENDER" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%highlight(%d{MMM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{30}: %msg %xEx%n)</pattern>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="CONSOLE_APPENDER"/>
+    </root>
+
+    <logger name="com.neemre.btcdcli4j" level="WARN"/>
+    <logger name="io.grpc.netty" level="WARN"/>
+</configuration>