Add full support for find.all.by
Iterate over find.by, find.all.by api.
feat(exceptions): Custom page exceptions.
fix(package): Require exceptions on install.
Merge pull request #12 from Droogans/find-all-api

Add full support for find.all.by
@stuplum bumped version number
fix(readme): Page elements aren't promises.
Merge pull request #15 from Droogans/page-exceptions

feat(exceptions): Custom page exceptions.
@stuplum tidied up readme and bumped version number