Move Deployment and BootconfigParser into libostree

As part of moving admin functionality there.  While we are doing this,
rename OtConfigParser to OstreeBootConfig parser since it's a better
name.

src/libostree/ostree.h

@@ -27,4 +27,6 @@
 #include <ostree-mutable-tree.h>
 #include <ostree-repo-file.h>
 #include <ostree-sysroot.h>
+#include <ostree-deployment.h>
+#include <ostree-bootconfig-parser.h>
 #include <ostree-diff.h>