Remove defaults for optional args for 1.8.7 compatibility

[slothbear]

Also remove ruby-debug19 for 1.8.7 compatibility.

This is my first pull request, so use the code, use pieces, ignore it, or whatever is appropriate. I wasn't sure of the correct style for the optional arguments. These changes made everything work ok in my project on 1.8.7. I didn't review all code, so there may be other 1.9.2 stuff still lurking.

Also, all specs pass on 1.8.7 except for one, which I couldn't figure out how to fix.

  1) Tanker Kaminari support should be able to return Kaminari compatible array for a search
     Failure/Error: array = Person.search_tank('hey!')
     NameError:
       uninitialized constant Tanker::KaminariPaginatedArray
     # ./spec/../lib/tanker.rb:153:in `paginate_results'
     # ./spec/../lib/tanker.rb:118:in `search'
     # ./spec/../lib/tanker.rb:251:in `search_tank'
     # ./spec/tanker_spec.rb:535

[arvida]

Hi, I did most of these 1.8.7 incompatiblities. Sorry!
For the KaminariPaginatedArray initializer I think we could skip the optional argument for now as we are always giving the limit_val argument when using it, like:

class KaminariPaginatedArray < Array
...
def initialize(original_array, limit_val, offset_val, total_count)
  @limit_value, @offset_value, @total_count = limit_val, offset_val, total_count

I am looking in to the problem with the spec, there seem to be a problem with autoload and running code using KaminariPaginatedArray a second time in the spec on 1.8.7, if I remove the first kaminari support spec (should raise error..) it works fine..

[arvida]

Update: #29

[kidpollo]

great work guys ! this is awesome ! Where are you guys located? I am want to send u guys Index Tank tshirts !

They are really awesome!

[arvida]

awesome, thanks! i am in sweden, ill drop a mess with my address.