support DBI's wrapper class for example Amon2::DBI, DBIx::Sunny.
Merge pull request #2 from gunyarakun/master

Remove broken txn_end()
Fixed pod syntax error. And added xt/pod.t for checking pod syntax.
change Changes and version++
update manifest
Merge pull request #3 from tokuhirom/master

	 Fixed pod syntax error. And added xt/pod.t for checking pod syntax.
Merge pull request #1 from walf443/support_dbi_wrapper

support DBI's wrapper class for example Amon2::DBI, DBIx::Sunny.
version++ & change Changes
updage manifest
replace_named_presholder is public method
fixed method name
fixed transaction with disconnect problem
version++