RFC: Update OrderedDict, OrderedSet constructors to take iterables (fixes #50, #64, #67)

[kmsquire]

• Plus minor related changes

Eventually, these data structures might be made moot, if JuliaLang/julia#10116 is merged. But for now, it would at least be worthwhile matching Dict and Set construction in base in Julia v0.3.

I plan to merge this in a day or two, pending any comments.

[coveralls]

Coverage decreased (-0.93%) to 81.67% when pulling 91ea71c on ordered_cleanup into 1d1afe5 on master.

[kmsquire]

I guess I should add some more tests...

[coveralls]

Coverage decreased (-1.36%) to 81.24% when pulling 7a4c643 on ordered_cleanup into 1d1afe5 on master.

[coveralls]

Coverage decreased (-1.35%) to 81.25% when pulling a284f97 on ordered_cleanup into 1d1afe5 on master.

[kmsquire]

That's all I plan to do for now. I added tests for OrderedDicts and OrderedSets, mostly by copying and modifying Dict and Set tests from Base. This actually uncovered a couple of bugs (tests are useful!), which I fixed as well.

This is a breaking change, in the sense that some constructors for the old version of OrderedDicts and OrderedSets no longer work. This does bring those mostly up to par with the constructors in v0.3, though, so I doubt many people will be affected.

At any rate, I'm going to bump the minor number, as opposed to the patch number, and make an announcement on julia-users.

[kmsquire]

Actually, I take that back--this isn't a breaking change. The old functionality is deprecated, and the new functionality is available. Does that warrant a bump in minor number?

[kmsquire]

I just bumped the patch.