Add back egg_test recipe

It currently tests slapos.core, slapos.recipe.build, slapos.recipe.template.

Conflicts:
	setup.py

(cherry picked from commit fea3a2e2)

(cherry picked from commit 838a68ce)

Thomas Lechauve work on simple HTML5 "Application Server" deployment.

Conflicts:
	CHANGES.txt
	component/tar/buildout.cfg
	setup.py
	slapos/recipe/downloader.py
	slapos/recipe/gitinit.py
	slapos/recipe/librecipe/execute.py
	software/gitrepo/git-http-backend.cgi.in
	software/gitrepo/gitweb.cgi.in
	software/gitrepo/gitweb.conf.in
	software/gitrepo/httpd.conf.in
	software/gitrepo/instance-gitrepo.cfg
	software/gitrepo/software.cfg
	software/lxc/instance-lxc.cfg
	software/lxc/lxc.conf.in
	software/lxc/software.cfg