- Also amend lower-level equivalent functionality to match (i.e. return nil on non-existence)
- Added a OOM metadata test
- Updated the example applications to support the BugsnagConfiguration's designated initializer and include the README within the project.

- Also amend lower-level equivalent functionality to match (i.e. return nil on non-existence)
- Added a OOM metadata test
- Updated the example applications to support the BugsnagConfiguration's designated initializer and include the README within the project.

….com:bugsnag/bugsnag-cocoa into robinmacharg/Add-Bugsnag.getMetadata_section

# Conflicts:
#	Source/BugsnagMetadata.h
#	Source/BugsnagMetadata.m

…ata_section