[sequencechart] build system upate

Added a make target nativelibs to the root Makefile. Updated README
accordingly.

Makefile

@@ -88,6 +88,12 @@ $(JNILIBS): nedxml
 	cd $(OMNETPP_UI_DIR)/$@ && $(MAKE) clean
 	cd $(OMNETPP_UI_DIR)/$@ && $(MAKE)
 
+nativelibs: nedxml
+	@echo ===== Compiling $@ =====
+	cd ide/org.omnetpp.ide.nativelibs && $(MAKE)
+	
+nativelibs-clean:
+	cd ide/org.omnetpp.ide.nativelibs && $(MAKE) clean	
 
 #
 # Documentation

ide/org.omnetpp.ide.nativelibs/Makefile

@@ -56,7 +56,8 @@ ifeq ("$(JNI_LIB_SUFFIX)",".jnilib")
 STRIP_FLAGS=-x
 endif
 
-DLL_TARGET_DIR = ../org.omnetpp.ide.nativelibs.$(PLATFORM)
+UI_VERSION_STRING = 4.1.0.100611-4b63c38
+DLL_TARGET_DIR = ../plugins/org.omnetpp.ide.nativelibs.$(PLATFORM)_$(UI_VERSION_STRING)
 
 #
 # Local definitions
@@ -114,7 +115,7 @@ $O/$(DLL): $(OBJS)
 	$(STRIP) $(STRIP_FLAGS) $O/$(DLL)
 
 $(DLL_TARGET_DIR)/$(DLL): $O/$(DLL)
-	cp $O/$(DLL) $(DLL_TARGET_DIR)
+	cp $O/$(DLL) $(DLL_TARGET_DIR)/$(DLL)
 
 
 missing-dependency:

ide/org.omnetpp.sequencechart/README.txt

@@ -36,15 +36,15 @@ Building from source
 1. Build and install C++ nativelibs:
 ------------------------------------
 
+- Make sure that SWIG 1.x is correctly installed
+
 - Build libopplibs.so and create Java wrappers
-    $> cd ide/org.omnetpp.ide.nativelibs
-    $> make
-  This creates the file "horizon/out/gcc-<mode>/ui/libopplibs.so" and Java 
-  files in "ide/org.omnetpp.ide.nativelibs/src"
-  
-- Replace the stock libopplibs.so file in 
-  "ide/org.omnetpp.ide.nativelibs.<YOUR-PLATFORM>_<version-string>" with the 
-  previously built libopplibs.so
+    $> cd <horizon-root>
+    $> make nativelibs
+
+  This creates Java JNI wrapper files in ide/org.omnetpp.ide.nativelibs/src and
+  installs the C++ counterpart in 
+  ide/plugins/org.omnetpp.ide.nativelibs.<YOUR_PLATFORM>-<VERSION_STRING>/libopplibs.so
 
 
 2. Build and install Java nativelibs wrapper