Make readme link work on GH and doxygen

Author: MatthijsBurgh

ed_sensor_integration/README.md

@@ -34,7 +34,7 @@ Interfaces:
 * bar
 
 ## Tools
-Several tools are available for testing the features of this repository. These can be found in the [tools](tools) along with their documentation.
+Several tools are available for testing the features of this repository. These can be found in the [tools](tools) along with their [documentation](tools/README.md).
 
 ## Issues with current toolchain
 

ed_sensor_integration/rosdoc.yaml

@@ -1,5 +1,5 @@
 - builder: doxygen
   name: C++ API
-  file_patterns: '*.c *.cpp *.h *.hpp'
+  file_patterns: '*.c *.cpp *.h *.hpp *.md'
   tab_size: 4
   use_mdfile_as_mainpage: README.md