Fixed warnings when running the tests with ruby -w.
Revert some warning fixes because rbx-19mode fails.
Removed old 'json' import

[#17] Having the Rake task 'require json' without coveralls having an explicit
dependency on the json gem means the task fails if you don't also depend
on the json gem yourself. Removed the 'require' line becase it wasn't doing
anything.
remove & interpreted as argument prefix.

By adding the ()s, we make this unambiguous.
remove instance variable not initialized warnings.
Add flag to disable noisy output

lemurheavy/coveralls-ruby#23
All output now goes through Coveralls::Output

lemurheavy/coveralls-ruby#23
Fix typo
expose a will_run? method
Accept more than 1 color argument for Coveralls::Output methods
Use 'double' instead of 'mock' for rspec-mocks

'mock' is deprecated after rspec-mocks 2.14.0.rc1(2013-05-27 released).
'mock' method may be removed for rspec-mocks 3.0.0.

And, this fix can remove following warnings.
DEPRECATION: mock is deprecated. Use double instead. Called from spec/coveralls/simplecov_spec.rb:64:in `block (4 levels) in <top (required)>'.
Merge pull request #20 from drrb/nojson

Removed old 'json' import
Merge pull request #29 from co-me/deprecated-method

Use 'double' instead of 'mock' for rspec-mocks
merged phoet-check_for_running
Merge branch 'phoet-check_for_running'
merged pengwynn-patch-1
merged pr/21
merging steveklabnik-remove_warnings
merging Nucc-master; upgraded rspec; cleaned up more Ruby warnings
fix #will_run? testing disabled spec