adding a README file to the Git repository as recommended by GitHub. Refs: #14.

README.txt

@@ -0,0 +1,41 @@
+This repository contains the sources for the BlackBox Component Builder
+and the command line compiler(s). A command line compiler is necessary for the CI
+(continues integration) process used for BlackBox development.
+For details of the build process see appbuild/build*.py.
+
+
+The general purpose BlackBox scripting tool bbscript.exe is based
+on the scripting engine introduced in subsystem Script, which is 
+not part of the generated BlackBox distribution.
+
+For compiling the BlackBox Component Builder:
+
+    bbscript.exe /PAR Dev/Docu/Build-Tool.odc
+
+For building a new bbscript.exe:
+
+    bbscript.exe /PAR appbuild/newbbscript.txt
+
+    or
+
+    1. Add 'Script' folder to your BlackBox directory
+    2. Execute all commands from appbuild/newbbscript.txt
+
+
+The command line compiler dev0 is based on a general purpose but limited
+BlackBox scripting feature introduced in the directories Cons and Interp,
+which are not part of the generated BlackBox distribution.
+
+
+For compiling the BlackBox Component Builder:
+
+    dev0.exe < appbuild/build.txt
+
+For building a new dev0.exe:
+
+    dev0.exe < appbuild/newdev0.txt
+
+    or
+
+    1. Add 'Cons' and 'Interp' folders to your BlackBox directory
+    2. Execute all commanders from Interp/Docu/Quick-Start.odc