[DOC] Demo for alignExtend().

git-svn-id: http://svn.seqan.de/seqan/trunk@14453 e6417c60-b987-48fd-844e-b20f0fcc1017
[FIX] Fixing methylation computation plus methylation seeds in Mason2.

git-svn-id: http://svn.seqan.de/seqan/trunk@14454 e6417c60-b987-48fd-844e-b20f0fcc1017