Upgrade core library version 0.80.4 -> 0.80.5
Merge pull request #737 from realm/ks-use-core-ver-0.80.5

Upgrade core library version 0.80.4 -> 0.80.5
Update changelog for core version bump
temporary fix for casting issue
Merge pull request #740 from realm/al-temp-fix

Temporary fix for casting issue in core
Merge pull request #739 from realm/tg-changelog

Update changelog for core version bump
Version bump
bump version
set date
Merge branch 'al-bump'
Update Swift code for Xcode 6 beta 5

Mostly mundane tweaks for changes to Swift. The two big ones are that swift's
name mangling is now just "module.classname" and that all properties have to be
explicitly declared as `dynamic`.

Closes #733.
Update Swift examples