Merge branch 'feature/#112_Add_websocket_dependencies_to_contra-config.cmake' into 'master'

Add websockets dependencies

Closes #112

See merge request VR-Group/in-situ-pipeline/contra!67

cmake/contra-config.cmake

@@ -61,6 +61,15 @@ foreach(COMPONENT ${contra_FIND_COMPONENTS})
                 endif(NOT contra_FIND_QUIETLY)
                 continue()
             endif(NOT Boost_FOUND)
+        elseif (${COMPONENT} STREQUAL "websockets")
+            find_package(Boost REQUIRED system)
+            find_package(Threads REQUIRED)
+            if (NOT Boost_FOUND)
+                if(NOT contra_FIND_QUIETLY)
+                    message(SEND_ERROR "Did not find dependency for contra component `${COMPONENT}`: boost")
+                endif(NOT contra_FIND_QUIETLY)
+                continue()
+            endif(NOT Boost_FOUND)
         endif ()
 
         include(${COMPONENT_CONFIG_FILE})