Add temporary documentation files and profiling output to .hgignore

.hgignore

@@ -4,10 +4,11 b''
 \.so$
 \.pyc$
 \.swp$
+\.prof$
 ^tests/.*\.err$
 ^build/
 ^dist/
-^doc/.*\.[0-9]$
+^doc/.*\.[0-9](\.(x|ht)ml)?$
 ^MANIFEST$
 ^\.pc/
 ^patches/