Fix the RLMVerifyInWriteTransaction error message

Closes #1094.
fix for crash on delete
Merge branch 'master' into al-delete
Merge pull request #1100 from realm/al-delete

Fix for crash when deleting an object from multiple threads
Release 0.87.3
test examples after they've been packaged
fixed issues with examples and browser packaging
Merge pull request #1107 from realm/jp-text-examples-post-package

test examples after they've been packaged
fixed typo in changelog
Fix browser location in release zip and release 0.87.4
removed ?? summary from CHANGELOG
fixed browser packaging
added "backlink" examples for objc & swift
added Backlink examples to build.sh
share Backlink schemes
Fixed bad absolute paths and set deployment target to 7.0 for Backlink examples
added test to confirm that Swift RLMObject properties with no setter defined are ignored by Realm
Merge pull request #1116 from realm/jp-swift-readonly-test

added test to confirm that Swift RLMObject properties with no setter defined are ignored by Realm
Merge pull request #1110 from realm/jp-backlink-examples

added "backlink" examples for objc & swift
Added GroupedTableView examples for Objective-C and Swift