Introduced the ability to create global keychain configurations. These configurations are each named, and multiple may be be created. Then each Xcode job can specify a named keychain configuration to use during its build.
The changes for using a global keychain configuration should be at least a minor version, so the Maven development version has been moved up to 1.4-SNAPSHOT.
Merge branch 'global-named-keychains' of https://github.com/dlvenable/xcode-plugin into dlvenable-global-named-keychains

Conflicts:
	pom.xml
	src/main/java/au/com/rayh/XCodeBuilder.java
Fix @since to reflect plugin releases