Replaces coveralls with code climate

[cdmo]

additionally I removed a gem called ruby-debug because it kept giving this error below and I didn't think we used it anyway:

➜  psulib_traject git:(codeclimate) ✗ bundle exec rake
jruby: warning: unknown property jruby.cext.enabled
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.jruby.util.SecurityHelper to field java.lang.reflect.Field.modifiers
WARNING: Please consider reporting this to the maintainers of org.jruby.util.SecurityHelper
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
sBundler could not find compatible versions for gem "linecache":
  In snapshot (Gemfile.lock):
    linecache (= 1.3.1)

  In Gemfile:
    ruby-debug java was resolved to 0.10.6, which depends on
      linecache (~> 1.3.1) java

Running `bundle update` will rebuild your snapshot from scratch, using only
the gems in your Gemfile, which may resolve the conflict.

[banukutlu]

guess you got hathi_overlaps/overlap_all_unique.csv mistakenly in with this PR?

[banukutlu]

needs a rebase :)

[banukutlu]

reviewed and looks great but the travis build fails - seems an easy change

[banukutlu]

👍