Run Travis-CI with multiple rails versions
Clean up rails configurations from dummy app

Remove some to make it version independent, and add some to suppress
warnings.
Replace `match` routing methods with `get` in dummy app
Work with rails 4.1.x
Set fixtures path absolutely

In rail 4.x, it is relative to RAILS_ROOT by default.
Support itemscope used as boolean attributes

In rails 4.x, itemscope attribute is treated as boolean. See for more
detail at: https://github.com/rails/rails/commit/283133a59cfdb56c24582389eebc80a202f7f52b
Use assert_dom_equal to compare HTML string

Orders of attributes are not always same in rails 3.2 and 4.x.
Merge pull request #39 from a2ikm/rails4.1

Add rails 4.1 support and run Travis-CI with multiple rails versions