Add solutions for part 1

tools/JackCompiler.bat

@@ -0,0 +1,26 @@
+@echo off
+
+rem  $Id: JackCompiler.bat,v 1.2 2014/05/10 00:52:43 marka Exp $
+rem  mark.armbrust@pobox.com
+
+setlocal
+if not "%2"=="" goto :USAGE
+if "%~1"=="/?" (
+:USAGE
+  echo Usage:
+  echo     JackCompiler              Compiles all .jack files in the current
+  echo                               working directory.
+  echo     JackCompiler DIRECTORY    Compiles all .jack files in DIRECTORY.
+  echo     JackCompiler FILE.jack    Compiles FILE.jack to FILE.vm.
+  exit -b
+)
+if not "%~1"=="" (
+  set "_arg1=%~f1"
+) else (
+  set "_arg1=%CD%"
+)
+pushd "%~dp0"
+echo Compiling "%_arg1%"
+java -classpath "%CLASSPATH%;bin/classes;bin/lib/Hack.jar;bin/lib/Compilers.jar" ^
+  Hack.Compiler.JackCompiler "%_arg1%"
+popd