[doc] Add dumux logo to doxygen instead of title

doc/doxygen/Doxylocal

 # This file contains local changes to the doxygen configuration
 # please us '+=' to add file/directories to the lists
 
+PROJECT_NAME          = "*" # a hack to get a version number but no title (is in the logo already), also see css (under #projectname)
+PROJECT_BRIEF         = "DUNE for Multi-{Phase, Component, Scale, Physics, ...} flow and transport in porous media"
+PROJECT_LOGO          = @top_srcdir@/doc/logo/dumux_logo_small.png
+PROJECT_NUMBER        = @DUNE_MOD_VERSION@
+
 PREDEFINED            += "NEW_PROP_TAG(name)=Property tag name" \
                          "NEW_TYPE_TAG(name)=Type tag name" \
                          HAVE_VALGRIND:=1

doc/doxygen/customdoxygendumux.css

@@ -1164,6 +1164,7 @@ dl.section dd {
 #projectlogo img
 {
 	border: 0px none;
+  padding-bottom: 10px;
 }
 
 #projectalign
@@ -1173,21 +1174,24 @@ dl.section dd {
 
 #projectname
 {
-	font: 300% Tahoma, Arial,sans-serif;
+  color: #ffffff;
+	font: 100% Tahoma, Arial,sans-serif;
 	margin: 0px;
-	padding: 2px 0px;
+  padding: 7px 0px;
 }
 
 #projectbrief
 {
 	font: 120% Tahoma, Arial,sans-serif;
 	margin: 0px;
-	padding: 0px;
+  padding-left: 13px;
+  padding-bottom: 10px;
 }
 
 #projectnumber
 {
-	font: 50% Tahoma, Arial,sans-serif;
+  color: #000000;
+	font: 150% Tahoma, Arial,sans-serif;
 	margin: 0px;
 	padding: 0px;
 }