Revert "Changed package_patch_installed_regex to Bishwa's suggestion (Redmine #817)"

This reverts commit ed3efaefb134a2292b2a51950287613596fb6575.
Update yum - "package_list_update_command" and "package_list_command", to operate on "--quiet" mode.

Information like these:

Centos:

Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: ftp.availo.se
 * extras: ftp.availo.se
 * updates: ftp.availo.se

RHEL:
Loaded plugins: rhnplugin, security
Skipping security plugin, no data

that are unnecessary for the software/patch list are silenced. Redmine #817
Added note about cfengine_stdlib.cf moving to core
Added note about other components in the copbl repository.
Fixed links
fix: avoid class name clash

The problem appended in this case:
if set_variable_values is used two time in a row in the same bundle
  and
    if the same key name is used

For example, in this case NM_CONTROLLED_in_file was defined for the first
file and the key was ignored for the second file.

"ifcfgeth0[BRIDGE]" string => "br0";
"ifcfgeth0[NM_CONTROLLED]" string => "no";

"ifcfgbr0[NM_CONTROLLED]" string => "no";

files:
    "/etc/sysconfig/network-scripts/ifcfg-eth0"
      edit_line => set_variable_values("app_srvkvm_set_up_bridge.ifcfgeth0");

files:
    "/etc/sysconfig/network-scripts/ifcfg-br0"
      edit_line => set_variable_values("app_srvkvm_set_up_bridge.ifcfgbr0");
Merge pull request #25 from goneri/master

fix: avoid class name clash.
Merge branch 'master' of git://github.com/cfengine/copbl