Adding a ant task for compiling JSP files

Goal is to precompile JSP files during development work and to reduce start up time after a deployment of a new version.

- During development it can occur that (bean) functionality is removed (for example while code cleanup) and this kind of error would first be visible after deployment of a new package / version.

- If a new package is deployed in for example Apache Tomcat there is an amount of time until the package becomes available. One reason for this is the compilation of JSP files inside the application server.

There a many websites (for example http://firstclassthoughts.co.uk/ant/jsp_compile.html or http://scriptlandia.blogspot.com/2006/04/how-to-pre-compile-jsp-pages-for.html) which describe how to compile the JSP files.