generate multiple sets of accessors for different schema
pr fixes
changelog
Merge pull request #1135 from realm/al-accessors

Generate multiple sets of accessors for different schema
fix for schema version initialization
changelog
added method to change the default Realm path
Merge pull request #1142 from realm/al-version

Fix for incorrect Realm version for newly created Realms
make sure accessor creation is thread safe
Merge pull request #1146 from realm/al-accessors

Make sure accessor creation is thread safe
Merge pull request #1143 from realm/al-default

Add method to change the default Realm path
Move the debugger summary string creation to obj-c

And provide a single C function to call so that the syntax in obj-c and Swift
is identical.
Make the RLMArray/RLMResults children provider work for Swift
Use direct ivar access for the RLMArray _realm ivar
Refactor things a little
Fix some Swift crashes
Make the accessor child provider kinda work from Swift