Restructure distribution content

Include LICENCE and INSTALL text files and ensure that .bat file is
not set with executable Unix file permissions.

spring-boot-cli/src/main/content/INSTALL.txt

@@ -0,0 +1,35 @@
+SPRING BOOT CLI - INSTALLATION
+==============================
+
+Thank you for downloading the Spring Boot CLI tool. Please follow these instructions
+in order to complete your installation.
+
+
+Prerequisites
+-------------
+Spring Boot CLI requires Java JDK v1.6 or above in order to run. Groovy v2.1 is packaged
+as part of this distribution, and therefore does not need to be installed (any existing
+Groovy installation is ignored).
+
+The CLI will use whatever JDK it finds on your path, to check that you have an appropriate
+version you should run:
+
+	java -version
+
+Alternatively, you can set the JAVA_HOME environment variable to point an suitable JDK.
+
+
+Environment Variables
+---------------------
+No specific environment variables are required to run the CLI, however, you may want to
+set SPRING_HOME to point to a specific installation.  You should also add SPRING_HOME/bin
+to your PATH environment variable.
+
+
+Checking Your Installation
+--------------------------
+To test if you have successfully install the CLI you can run the following command:
+
+	spring --version
+
+