Bump versions up to 0.12.99 since a 0.12 release was just created.
diff --git a/Doxyfile b/Doxyfile
index cf52c48..da39aca 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -23,7 +23,7 @@
 # This could be handy for archiving the generated documentation or 
 # if some version control system is used.
 
-PROJECT_NUMBER         = 0.11.99
+PROJECT_NUMBER         = 0.12.99
 
 # The OUTPUT_DIRECTORY tag is used to specify the (relative or absolute) 
 # base path where the generated documentation will be put.