Added firefox extension code

extensions/linux/src/Makefile

@@ -0,0 +1,41 @@
+CXX   = c++
+CPPFLAGS +=     -fno-rtti              \
+		-fno-exceptions        \
+		-shared  
+
+# CASA includes
+CASA_INCLUDE_PATH = ../../../include
+ 
+# Change this to point at your Gecko SDK directory. 
+GECKO_LIB_PATH = /usr/lib/xulrunner-1.8.0.1
+GECKO_INCLUDE_PATH = /usr/include/xulrunner-1.8.0.1
+MOZILLA_NSPR4_DEVEL = /usr/include/nspr4
+
+# GCC only define which allows us to not have to #include mozilla-config 
+# in every .cpp file.  If your not using GCC remove this line and add 
+# #include "mozilla-config.h" to each of your .cpp files. 
+GECKO_CONFIG_INCLUDE = -include mozilla-config.h 
+ 
+#MOZILLA_STRICT_API is needed for gecko-sdk 1.7 or earlier		       
+#GECKO_DEFINES  = -DMOZILLA_STRICT_API
+GECKO_DEFINES  = 
+
+CASA_INCLUDE = -I $(CASA_INCLUDE_PATH) 
+XPCOM_INCLUDES = -I $(GECKO_INCLUDE_PATH) -I $(MOZILLA_NSPR4_DEVEL)
+ 
+GECKO_LDFLAGS =  -L $(GECKO_LIB_PATH) \
+		 -lxpcom \
+                 -lnspr4      \
+                 -lplds4      
+
+FILES = MiCASAKeys.cpp MiCASAKeysModule.cpp 
+
+TARGET = MiCASAKeys.so
+
+build: 
+	$(CXX) -Wall -Os -o $(TARGET) $(CASA_INCLUDE) $(GECKO_CONFIG_INCLUDE) $(GECKO_DEFINES) $(XPCOM_INCLUDES) $(CPPFLAGS) $(CXXFLAGS) $(FILES) $(GECKO_LIB_PATH)/libxpcomglue_s.a $(GECKO_LDFLAGS)
+	chmod +x $(TARGET)
+#	strip $(TARGET)
+ 
+clean: 
+	rm $(TARGET)