Merge pull request #21 from wuwx/master

让helper直接从ActionController::Base产生
support rails4
Add a blank message row when there's no records for output
Disable blank message when set false in table_options
Merge pull request #28 from zhusee2/blank_msg

Add a blank message row when there's no records for output
bumpt to 2.2.0
Merge branch 'rails40'
bump to 4.2.2.0
update to rc1
to RC
add ibutton feature
edit change log
bump version
Rails 4.0.0 official