updated examples structure to use a single Xcode project per platform/language combination
fixed osx/objc/RealmExamples
- shared all RealmExamples schemes
- added package_examples.rb
re-added realm files for Migration examples
attempt to fix conditional ios framework build phase in ios/objc/RealmExamples
attempt to fix CI by cleaning for every target in RealmExamples
another attempt at fixing CI
Fix the framework search path for the examples
Set the executables to run for the example projects
Merge pull request #879 from realm/jp-examples

New examples structure and packaging
Add the release packaging scripts to build.sh

This keeps the same release flow of Jenkins assembling tested artifacts into
the final release package, and just moves the scripts for doing so into
build.sh so that changes to the release packaging can be done via PRs. It also
adds a test target which mimics the CI setup's assembly flow (but not any of
the actual releasing parts) so that changes to the release tasks can be tested
locally.
Update the release scripts for the new examples packaging