Updated Travis tests

.gitignore

@@ -25,6 +25,7 @@
 # IDE
 ##############################
 .idea
+.vscode/
 
 ##############################
 # CMake

.travis.yml

@@ -2,7 +2,19 @@ language: cpp
 
 matrix:
   include:
-      os: linux
+    # Tests on Ubuntu 14.04
+    - os: linux
+      dist: trusty
+      addons:
+       apt:
+         sources:
+           - ubuntu-toolchain-r-test
+         packages:
+           - build-essential
+           - cmake
+           - libwxgtk3.0-dev
+    # Tests on Ubuntu 16.04
+    - os: linux
       dist: xenial
       addons:
        apt:
@@ -12,9 +24,9 @@ matrix:
            - build-essential
            - cmake
            - libwxgtk3.0-dev
-
 script:
      - mkdir build
      - cd build
      - cmake -DCMAKE_BUILD_TYPE=Coverage ..
      - make
+     - make install

CMakeLists.txt

@@ -10,25 +10,25 @@ include(${wxWidgets_USE_FILE})
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -s")
 
 # Sources
-file(GLOB SOURCE_FILES src/*.cpp src/*.h)
-file(GLOB LANG_FILES msg/*.po)
+file(GLOB SRC_FILES src/*.cpp src/*.h)
+file(GLOB MSG_FILES msg/*.po)
 
 # Translation files
 if(GETTEXT_FOUND)
-    foreach(LANG_FILE ${LANG_FILES})
-        # Remove path and extension of 'LANG_FILE'
-        get_filename_component(LANG_NAME ${LANG_FILE} NAME_WE)
+    foreach(MSG_FILE ${MSG_FILES})
+        # Remove path and extension of 'MSG_FILE'
+        get_filename_component(MSG_NAME ${MSG_FILE} NAME_WE)
         # Compile each '.po' file to '.gmo' file
-        GETTEXT_PROCESS_PO_FILES(${LANG_NAME} ALL PO_FILES "msg/${LANG_NAME}.po")
+        GETTEXT_PROCESS_PO_FILES(${MSG_NAME} ALL PO_FILES "msg/${MSG_NAME}.po")
         # Define the files location during install process
-        install(FILES "${CMAKE_CURRENT_BINARY_DIR}/${LANG_NAME}.gmo" DESTINATION "share/${PROJECT_NAME}/resource/msg/${LANG_NAME}/" RENAME "${PROJECT_NAME}.mo")
+        install(FILES "${CMAKE_CURRENT_BINARY_DIR}/${MSG_NAME}.gmo" DESTINATION "share/${PROJECT_NAME}/resource/msg/${MSG_NAME}/" RENAME "${PROJECT_NAME}.mo")
     endforeach()
 else()
     message(WARNING "gettext tools not found. Translations will not be built.")
 endif()
 
 # Compile the main executable
-add_executable(wxmp3val ${SOURCE_FILES})
+add_executable(wxmp3val ${SRC_FILES})
 target_link_libraries(wxmp3val ${wxWidgets_LIBRARIES})
 
 # Define the files location during install process