Extended osi_trafficsign.proto with missing signs (fixes #261, fixes #241, fixes #281, fixes #219) (#258)

* Extended osi_trafficsign.proto with missing main and supplementary signs from StVO.
* Add Arrow and Actor to supplementary sign. Not added to main sign because of leading to too many depreciated types. Will be proposed to change in OSI 4.0.0.
* Added text field in traffic sign value.
* Harmonized enumerators for types for main and supplementary signs.
* Added BASt images.
* Updated documentation.

Author: nikolavasiljevski

CMakeLists.txt

@@ -118,7 +118,7 @@ install(TARGETS ${PROJECT_NAME}_pic
         EXPORT ${PROJECT_NAME}_targets
         ARCHIVE DESTINATION "${INSTALL_LIB_DIR}" COMPONENT lib)
 
-add_library(${PROJECT_NAME} SHARED $<TARGET_OBJECTS:${PROJECT_NAME}_obj>)
+add_library(${PROJECT_NAME} STATIC $<TARGET_OBJECTS:${PROJECT_NAME}_obj>)
 target_include_directories(${PROJECT_NAME}
     PUBLIC
         ${PROTOBUF_INCLUDE_DIR}