Added red & black CSV

... those csv serve the rule black or red roofs. This rule isn't yet
implemented, but works when inserting the rule manually into the
config.xml file : (heree 80 black, 20 red roofs)
<random-seed>
            <min>0</min>
            <max>100</max>

<identifier>colors</identifier>
        </random-seed>

<rule type="object">
            <filter type="key-value">

building=residential
                building=house

building=terrace
                building=apartments

building=detached
                building=garage

building=yes,area=residential
                building=yes,area=none

</filter>
            <circular>false</circular>

<tolerance>1</tolerance>

<restrict-height>true</restrict-height>

<default-height>city_heights</default-height>

<min-random-height>3</min-random-height>

<max-random-height>15</max-random-height>

<best-fit>./resources/residential-black.csv</best-fit>

<random-execute seed="colors" min="0" max="80" />  <!-- %50% -->

</rule>

        <rule type="object">
            <filter
type="key-value">
                building=residential

building=house
                building=terrace

building=apartments
                building=detached

building=garage
                building=yes,area=residential

building=yes,area=none
            </filter>

<circular>false</circular>
            <tolerance>1</tolerance>

<restrict-height>true</restrict-height>

<default-height>city_heights</default-height>

<min-random-height>3</min-random-height>

<max-random-height>15</max-random-height>

<best-fit>./resources/residential-red.csv</best-fit>

<random-execute seed="colors" min="0" max="20" />  <!-- %50% -->

</rule>