Avoid alias_method_chain

[mlarraz]

This is deprecated as of Rails 5 (in favor of Module#prepend, which is only in Ruby 2+).

Since we still have to support Ruby 1.8, just create the aliases manually

[fwininger]

Thank you so much ! I work yesterday on the same commit, but don't have time to do the pull request ! Please @kjg, can you merge it.

[awendt]

I'd like to question our support for Ruby 1.8 once again, its support ended loooong time ago. People shouldn't be using it in production anymore.

@kjg What do you think?

[fwininger]

I agree with you. I think we can drop the support of ruby-1.8, ruby-1.9 to use more ruby synthax. Moreover, we can also drop the support of rails 2 and 3, to focus on rails 4 and 5.

[kjg]

I'll pull this in as well as #116 and make a new release, and then we can create a 2.x branch and then drop support for ruby 1.8 and older rails on the master branch. How does that sound?

[packrat386]

If y'all are going to do that, you should make sure to include a restraint in the gemspec for certain versions of ruby. Also, although 2.0 came out relatively recently, it might be good to leave 2.x supporting what it currently supports and then have 3.0 drop support for some older frameworks.