Update README.md

Although Exceptions are the most obvious solution (for people using languages where exceptions are a norm), no one's said that this will actually be it. "Better error handling features" could be a lot of things, e.g. a standardized way of passing result/error as an enum and a built-in operator to chain operations based on that. Could be. We don't know.
Merge pull request #7 from radex/patch-1

Better error handling features
Adding a more recent statement from Joe Groff about operator characters
Merge pull request #8 from frozendevil/patch-2

Adding a more recent statement from Joe Groff about operator characters
Add another access control quote
Adding: Structs with both @lazy and non-lazy properties
Merge pull request #9 from roop/struct_with_lazy_and_nonlazy_properties

Adding: Structs with both @lazy and non-lazy properties
Fix link for structs with lazy
Add resolved section.
Phrasing, as suggested by @radex.
Merge pull request #10 from jklausa/master

Add resolved section.
Add β3 syntax changes
Merge pull request #11 from radex/patch-2

More changes from Beta 3
C Union info

jckarter posted an promise for importing C-unions.
Update README.md
Merge pull request #12 from dete/master

C Union Promise
Improve C union support title
Add IBOutlet
Add Ranges
Improve wording of contributing section