SDK diet and license text improved (#127)

- Exclude unnecessary binaries
- Better license wording

ExternalApps/HelloWorld/CMakeLists.txt

@@ -6,7 +6,7 @@ if (DEFINED ENV{TACTILITY_SDK_PATH})
     set(TACTILITY_SDK_PATH $ENV{TACTILITY_SDK_PATH})
 else()
     set(TACTILITY_SDK_PATH "../../release/TactilitySDK")
-    message(WARNING "⚠️ TACTILITY_SDK_PATH environment variable is not set, defaulting to ${TACTILITY_PATH}")
+    message(WARNING "⚠️ TACTILITY_SDK_PATH environment variable is not set, defaulting to ${TACTILITY_SDK_PATH}")
 endif()
 
 include("${TACTILITY_SDK_PATH}/TactilitySDK.cmake")

ExternalApps/HelloWorld/build.sh

@@ -1,4 +1,4 @@
 rm sdkconfig
 cp ../../sdkconfig sdkconfig
 cat sdkconfig.override >> sdkconfig
-idf.py build
+idf.py elf_app