Add API examples
RELEASE_NOTES=n/a
// note that bug reports will be silently ignored and the API WILL CHANGE
// WITHOUT NOTICE until this note is gone.
//
+// If you want to try it anyway please look at the following examples:
+// * https://github.com/gopasspw/gopass-hibp
+// * https://github.com/gopasspw/gopass-jsonapi
+// * https://github.com/gopasspw/git-credential-gopass
+// * https://github.com/gopasspw/gopass-summon-provider
+//
package gopass
