Add a new configuration to compile the project in Debug mode (Travis)

.travis.yml

@@ -11,11 +11,11 @@ os:
   - osx
 
 env:
-  - CMAKE_OPTIONS="" # Default 
-  - CMAKE_OPTIONS="-DEXIV2_ENABLE_VIDEO=ON -DEXIV2_ENABLE_WEBREADY=ON" # All enabled
-  - CMAKE_OPTIONS="-DEXIV2_ENABLE_XMP=OFF -DEXIV2_ENABLE_NLS=OFF -DEXIV2_ENABLE_LENSDATA=OFF" # All disabled
-  - CMAKE_OPTIONS="-DEXIV2_ENABLE_WEBREADY=ON -DEXIV2_ENABLE_CURL=OFF -DEXIV2_ENABLE_SSH=OFF" # WebReady without SSH nor CURL
-    
+  - CMAKE_OPTIONS="-DCMAKE_BUILD_TYPE=Release" # Default
+  - CMAKE_OPTIONS="-DCMAKE_BUILD_TYPE=Debug"   # Default (Debug mode)
+  - CMAKE_OPTIONS="-DCMAKE_BUILD_TYPE=Release -DEXIV2_ENABLE_VIDEO=ON -DEXIV2_ENABLE_WEBREADY=ON" # All enabled
+  - CMAKE_OPTIONS="-DCMAKE_BUILD_TYPE=Release -DEXIV2_ENABLE_XMP=OFF -DEXIV2_ENABLE_NLS=OFF -DEXIV2_ENABLE_LENSDATA=OFF" # All disabled
+  - CMAKE_OPTIONS="-DCMAKE_BUILD_TYPE=Release -DEXIV2_ENABLE_WEBREADY=ON -DEXIV2_ENABLE_CURL=OFF -DEXIV2_ENABLE_SSH=OFF" # WebReady without SSH nor CURL
 
 install: ./.travis/install.sh
 script:  ./.travis/run.sh