Execute `afterAll` despite pending examples.

Example groups would only execute `afterAll` blocks when the number of run
examples was equal to the total number of examples. Pending examples are
never run, so this condition was never met for example groups containing
pending examples.

Add `pendingExampleCount` and change condition to execute `afterAll`
blocks when `(ran + pending) = total`. Execute `afterAll` blocks whether
the example group contains pending examples or not.

Also add a test which fails without the new conditional, but passes when
the new conditional is used.

Note that `beforeAll` and `afterAll` blocks are *not* executed when all
examples in the group are pending. This is not consistent with RSpec
behavior, which executes `before(:all)` and `after(:all)` blocks even if
all examples in the group are pending (as of 3.0.0).

Addresses https://github.com/specta/specta/issues/61.
Merge pull request #63 from yujinakayama/fix-crash-with-multiple-observer

Fix crash when another subclass of XCTestObserver is injected
Add a Test configuration

This is especially useful for sandboxed apps so they can disable code
signing for tests.
Merge pull request #70 from mdiep/test-configuration

Add a Test configuration
Merge pull request #67 from modocache/61-execute-after-all-despite-pending

Execute `afterAll` despite pending examples.
Specta.podspec: update description s/OCUnit/XCTest
Merge pull request #84 from modocache/update-podspec-description

Specta.podspec: update description s/OCUnit/XCTest
Replaced ^AsyncBlock with waitUntil - block introspection was unreliable.
dynamically generate test instance methods
Fixed most Xcode 6 related problems. Async testing and custom reporting are still broken.
fixed XCTest framework path for Xcode 6 Beta 2
fixed async specs
[README] Update external links
Merge pull request #88 from kylef/patch-2

[README] Update external links
Silence Xcode upgrade check
Merge pull request #90 from mdiep/xcode-upgrade-check

Silence Xcode's upgrade check
removed custom reporter support for now
added SPTCompiledExample
added spt_handleException which correctly treats exceptions with line and file user info as failures, not unexpected exceptions.
renamed SPTSpec to SPTTestSuite