update readme

Author: hrnr

README.md

@@ -1,8 +1,36 @@
-# map_merge
+# map_merge_3d
 
-ROS packages for merging 3D pointclouds.
+[![Build Status](http://build.ros.org/buildStatus/icon?job=Mdev__map_merge__ubuntu_bionic_amd64)](http://build.ros.org/job/Mdev__map_merge__ubuntu_bionic_amd64)
+
+ROS package for merging 3D point cloud maps.
+
+Installing
+----------
+
+The package is released for ROS Melodic.
+
+```
+	sudo apt install ros-${ROS_DISTRO}-map-merge-3d
+```
+
+Building
+--------
+
+The package should build as a standard catkin package. Use rosdep to resolve
+dependencies in ROS. The package is intended for ROS Melodic and newer, it
+should build on all [supported platforms](http://www.ros.org/reps/rep-0003.html#melodic-morenia-may-2018-may-2023)
+of ROS Melodic. Most notably, the package depends on PCL >= 1.8.
+
+You should use the brach specific for your release i.e. `melodic-devel` for
+ROS Melodic. Master branch is for the latest ROS.
+
+WIKI
+----
+
+The package is documented at ROS Wiki.
+* [map_merge_3d](http://wiki.ros.org/map_merge_3d)
 
 COPYRIGHT
 ---------
 
-Packages are licensed under BSD license. See respective files for details.
+The package is licensed under BSD license. See respective files for details.