implementation of periodic_update_index()
adding tomcat installation
improved doc
pep8 compiliance, docs, tomcat6 support
Add modules management for apache
Fix argument name
Merge branch 'tomcat'
Applying patches mentioned in here: https://github.com/ronnix/fabtools/pull/170#issuecomment-27638007
PEP8 cleanup for tomcat module
Switching some path concatenation to os.path.join
Fixing version typo
Adding overwrite flag for installation and configuration with backup.
Default behavior is to raise exception iff install detected.
Fixing up tests for version for tomcat module
Added a deploy_application method to upload WAR file to webapps path
Allows override of package name for require.nginx.server

This allow to install other packages like `nginx-extras` or
`nginx-light` instead of the default `nginx` package.
improved uptodate_index()
Merge branch 'main' into periodic_update_index

Conflicts:
	fabtools/system.py
Modules for Gentoo
Gentoo support for fabtools.system
Fix for fully qualified version checks/installs