Update SecureKeyPair.java

Added constructor with parameters
Ignore libraries from gradle.
Ignore classes.
J2Swift project update.
Updated headers.
J2Swift update project.
Swift implementation update.
Updated class.
Mandatory Id for Listeners and Callbacks.
Updated J2Swift project.
Updated swift implementation.
Ignore workspace state.
Updated Callback.
Support for printable in beans.
Updated swift implementation.
Merge pull request #51 from fnva/patch-10

Update SecureKeyPair.java
Main API refactoring.
Updated swift method order.
Update swift method order.
Updated method order.