Merge pull request #259 from SteveMacenski/readme_bringup

adding bringup readme and config folder for rviz configuration file

Author: SteveMacenski

nav2_bringup/README.md

@@ -0,0 +1,16 @@
+# nav2_bringup
+
+The `nav2_bringup` package is an example bringup system for navigation2 applications.
+
+## system_test.rviz
+
+There is an rviz configuration for testing base navigation2 systems.
+
+## map
+
+There is also an example map (pgm and yaml) for system level tests.
+
+## Future Work
+
+* adding configuration files for the example bringup
+* a more complete map for system level testing