Update to 3Tissue_v4.1.3

Update core/version.h and README.md

Author: thijsdhollander

README.md

@@ -64,7 +64,7 @@ MRtrix3Tissue is a fork of the MRtrix3 project. It adds capabilities for 3-Tissu
 
 You can build a particular release of MRtrix3Tissue by checking out the corresponding _tag_, and using the same procedure as above to build it:
 
-    git checkout 3Tissue_v4.0.0
+    git checkout 3Tissue_v4.1.3
 
     ./configure
 

core/version.h

@@ -9,7 +9,7 @@
 //   git tag -s 3.3
 //   git push
 
-#define MRTRIX_BASE_VERSION "3Tissue_v4.0.0"
+#define MRTRIX_BASE_VERSION "3Tissue_v4.1.3"
 
 #endif