initial checkin of osmo-remsim

This adds some initial code, particularly the ASN.1 definition of the
RSPRO protocol, related makefile to build it using ffasn1c, and our
usual autoconf infrastructure to build it.

Change-Id: Ibaa993b59e9a65a0242b0f42b27d9cd29f8e1878
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..281367f
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,29 @@
+*.o
+*.lo
+*.la
+*.a
+*.so
+*~
+.*.swp
+.deps
+.version
+.tarball-version
+autom4te.cache
+aclocal.m4
+config.guess
+config.log
+config.status
+config.sub
+configure
+compile
+depcomp
+install-sh
+libtool
+ltmain.sh
+missing
+Makefile.in
+Makefile
+Makefile.am.sample
+tags
+m4
+gen_rspro.stamp