move apps to subdirectory, add relative path support to Makefile

apps/Sensor Watch Starter Project/make/.gitignore

@@ -0,0 +1 @@
+build/

apps/Sensor Watch Starter Project/make/Makefile

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+# Leave these lines at the top of the file.
+# TOP should get us to the root of the project...
+TOP = ../../..
+# ...and make.mk has all the watch library sources and includes.
+include $(TOP)/make.mk
+
+# If you add any other subdirectories with header files you wish to include, add them after ../
+# Note that you will need to add a backslash at the end of any line you wish to continue, i.e.
+# INCLUDES += \
+#   -I../ \
+#   -I../drivers/ \
+#   -I../utils/
+INCLUDES += \
+  -I../ \
+
+# If you add any other source files you wish to compile, add them after ../app.c
+# Note that you will need to add a backslash at the end of any line you wish to continue, i.e.
+# SRCS += \
+#   ../app.c \
+#   ../drivers/bmp280.c \
+#   ../utils/temperature.c
+SRCS += \
+  ../app.c \
+
+# Leave this line at the bottom of the file; rules.mk has all the targets for making your project.
+include $(TOP)/rules.mk