update docs/*.md based on vagrant/*.sh

docs/install-on-centos-7.md

@@ -27,9 +27,10 @@ If you want to run the test suite, you need to install the following
 additional packages:
 
     sudo yum install -y python-pip python-Levenshtein python-psycopg2 \
-                        php-phpunit-PHPUnit
+                        python-numpy php-phpunit-PHPUnit
     pip install --user --upgrade pip setuptools lettuce==0.2.18 six==1.9 \
                                  haversine Shapely pytidylib
+    sudo pear install PHP_CodeSniffer
 
 
 System Configuration
@@ -102,6 +103,7 @@ sudo tee /etc/httpd/conf.d/nominatim.conf << EOFAPACHECONF
 <Directory "$USERHOME/Nominatim/build/website">
   Options FollowSymLinks MultiViews
   AddType text/html   .php
+  DirectoryIndex search.php
   Require all granted
 </Directory>