Enable building for Ruby 2.0.0 on Travis.
Adding more assertions for the "-d" flag

which looks like it's going to break for rbx, so I'll be headed there next...
Add more specs for edge cases of String#upto
String#upto returns non-alphabetic characters for single letters

Follow advice from @brixen to make tests more readable.
(Note: introduces dependency on working Enumerator implementation)
Time.new raises ArgumentError if the hour or the minute falls outside of the normal range.
Random.new returns differently seeded objects

Specs of Random#bytes [0] suggest that instances of Random returned by
Random.new should be seeded differently. Specs of Random.new did not
specify this behaviour. This commits introduces an appropriate test.

[0] https://github.com/rubyspec/rubyspec/blob/c1ecc82/core/random/bytes_spec.rb#L37
flatten! should not check modification by size
moving to example
Fix a spec for return value of Enumerator#{each_}with_object

"given object" depends #equal?, not #==
Fix a spec for last block parameter of Enumerator#{each_}with_object
Improve specs for Enumerator#{each_}with_object
Fix a spec description for Array#delete
Update a spec version guard for Array#delete
Merge pull request #196 from kachick/fix-array-delete

Fix an Array#delete spec for frozen array
Merge pull request #185 from obolzer/String#upto-ASCII

More specs for edge cases of String#upto
Merge pull request #189 from BanzaiMan/time_new_arg_errors

Time.new raises ArgumentError if the hour or the minute falls outside of...
Merge pull request #193 from kostya/master

flatten! should not check modification by size
Merge pull request #195 from kachick/improve-shared-enumerator-with_object

Improve specs for Enumerator#{each_}with_object
Merge pull request #183 from modcloth/more-dash-d-specs

Adding more assertions for the "-d" flag
Merge pull request #192 from jstepien/random-new-seeding

Random.new returns differently seeded objects