Add Centos 6.5 ISO build support [1/1]

Adding the ability to build a Crowbar 2.0 ISO.  The new part of this includes:
1. Support for Centos 6.5
2. A custom build of ruby 2.0.0p353
3. Inclusion of postgres1l 9.3

TBD:
a. Validation of the ruby build
b. Updating of the install-crowbar-native script




 crowbar.yml | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 51 insertions(+), 6 deletions(-)

Crowbar-Pull-ID: 15a77a85aac47fcfdff33933d2cf467cb255d735

Crowbar-Release: development