Reference shared/*.h using compiler flag, remove need to copy files to build host application. Remove related content in .git_ignore.

.gitignore

@@ -11,7 +11,6 @@
 
 # ignore shared files that have been copied to host-firmware dirs
 firmware/source/shared_*.h
-host/source/shared_*.h
 
 # ignore trash/temp files stored in host/ignore
 host/ignore

host/Makefile

@@ -1,6 +1,6 @@
 #compiler flags: -Wall Warnings all,  -g gdb debug markings, 
 CFLAGS=-Wall -O
-INCLUDE= -I ./include
+INCLUDE= -I ./include -I ../shared
 WINLIB= -L ./winlib
 LIBUSB= -lusb-1.0
 CC= gcc
@@ -13,12 +13,12 @@ LUAOBJ=$(wildcard source/lua/*.o)
 TARGET=inlretro
 
 #default to windows build
-all:	shared
+all:
 	$(CC) $(INCLUDE) $(LUAOBJ) $(SOURCES) -o $(TARGET) $(WINLIB) $(CFLAGS) $(LIBUSB) 
 
 #unix build doesn't need winlib directory as libusb should be installed on OS.
 #sudo apt-get install libusb-1.0-0-dev
-unix:	shared
+unix:
 	$(CC) $(INCLUDE) $(LUAOBJ) $(SOURCES) -o $(TARGET) $(CFLAGS) -lm $(LIBUSB)
 
 # "make debug" will build program with debug print messages
@@ -32,12 +32,6 @@ unixdebug: CFLAGS += -DDEBUG -g
 unixdebug: unix
 
 
-#copy shared .h files which are used in host and firmware
-shared:
-	cp -r ../shared/* source/
-
 #clean on unix and windows(.exe)
 clean:
-	rm -f $(TARGET) $(TARGET).exe $(OBJECTS) $(LUAOBJ)
-	rm -f source/shared_*
-
+	rm -f $(TARGET) $(TARGET).exe $(OBJECTS) $(LUAOBJ)