* use let(!) where appropriate (see [1] for more info).
* use `context` to portray scenarios
* use `describe` to portray method and Class specifications
* omit the word "should" from example descriptions (Dave Chelimsky
remarked to me that it was "tantamount to line-noise" and I'm of the
opinion that it adds no value.
* use more idiomatic Ruby (prefer things like 2.times to 1.upto(2))
* use more idiomatic Rails (prefer 1.minute.from_now to Time.now +
60*60)
* use more idiomatic Rspec (prefer album.should be_valid to
album.valid?.should be_true
* also ensure to only make one assertion per example
Other sundry cleanups.
[1] http://rdoc.info/github/rspec/rspec-core/master/RSpec/Core/Let/ClassMethods#let-instance_method
