Merge pull request #38 from jouvin/sl6.x-x86_64

Add a few feature RPM list
New group used for ldap or krb authentication
Add new YUM group used by UIs
Merge pull request #39 from Pansanel/sl6.x-x86_64

New group used for ldap or krb authentication
Fix iSCSI configuration (ensure iscsi service is started)
Provide standard templates to do the basic Java configuration
- variable JAVA_DEVEL_ENABLED to choose between basic openjdk packages or -devel packages
- JAVA_HOME definition based on JAVA_DEVEL_ENABLED
Add support for epel-testing through variable REPOSITORY_EPEL_TESTING_ENABLED
(disabled by default)
Merge pull request #42 from jouvin/sl6.x-iscsi

sl6.x: fix iSCSI configuration as part of base OS
Various RPM adjustments for defined features
Merge pull request #45 from jouvin/sl6.x-new-groups

Various RPM adjustments for defined features. For web-server, mod_ssl is effectively required. Other templates seems ok.
Merge pull request #43 from jouvin/sl6.x-java

Provide standard templates to do the basic Java configuration
Allow both epel and os-based (e.g. sl6_epel) repository template to be used
(same for epel-testing)
Merge pull request #44 from jouvin/sl6.x-epel-testing

Add support for epel-testing through variable REPOSITORY_EPEL_TESTING_ENABLED
Merge pull request #41 from jouvin/sl6.x-x86_64

Add ability to do base network configuration as part of the OS configuration
Markdownify the README a bit