Enhance image type support (#18)

* adds tiff support

* doc update

* adds memory-based =IPixelariumImage= implementation

* add usage example for custom user control

* enhance

* clang-format

fix readme

fix docs

examples/custom_1/CMakeLists.txt

@@ -0,0 +1,22 @@
+set(SRC
+  ${CMAKE_CURRENT_SOURCE_DIR}/custom_1.cpp)
+
+set(CUSTOM_1_NAME "${PROJECT_NAME}_custom1_app")
+
+add_executable(${CUSTOM_1_NAME} ${SRC})
+
+target_link_libraries(${CUSTOM_1_NAME}
+  PRIVATE pixelariumimagelib
+  PRIVATE pixelariumrenderlib
+  PRIVATE pixelariumutilslib
+  PRIVATE pixelariumresourcelib
+  PRIVATE pixelariumapplicationlib)
+
+target_include_directories(${CUSTOM_1_NAME}
+  PRIVATE ${PROJECT_SOURCE_DIR}/src
+  PRIVATE ${PROJECT_SOURCE_DIR}/lib
+  PRIVATE ${PROJECT_SOURCE_DIR}/lib/imaging
+  PRIVATE ${PROJECT_SOURCE_DIR}/lib/app
+  PRIVATE ${spdlog_DIR}/include
+  PRIVATE ${LIBCZI_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR})