Adding .gitignore

Adding the .gitignore file on root

Signed-off-by: Raffaele Aquilone <aquiloneraf@gmail.com>
Ant build system initialization

Added makefile for Ant build system, that shall orchestrate the
make-based build system of individual packages.

Signed-off-by: Raffaele Aquilone <aquiloneraf@gmail.com>
Merge branch 'buildsys_basic' into buildsys
Fixed build.xml and made some clean up

Made some minor changes:
 * Fixed some problems in build.xml, now it works and can launch
 * Makefiles with the -j parameter thanks to the "tn" Ant option
 * Cleaned up some rubbish in obj/ subtree
 * Added the bin/ subtree

Signed-off-by: Raffaele Aquilone <aquiloneraf@gmail.com>
Fixed nested Makefiles for parallel compilation.

Signed-off-by: Paolo Maresca <plo.maresca@gmail.com>