2014-02-09: Added tag 0.5.1 for changeset 775e4dc0b5b6 releases

Added tag 0.5.1 for changeset 775e4dc0b5b6

diff --git a/.hgtags b/.hgtags
--- a/.hgtags
+++ b/.hgtags
@@ -9,3 +9,4 @@ 0d5bd543ab137064aab252d5fe627a676b434e98
 ba0e1fba077fa2172a0b0a2c2841a3f3fd70d071 0.3
 c3d791b75bce0e424b68ccfceeaa1cc97aba0808 0.4
 c0777c0e1f5a04f4779558b8b67f8065cce6477b 0.5
+775e4dc0b5b624e6b26a77cc7b99e8cabd256f06 0.5.1