fix swig wrapper for Token.create_utf8, make it static

CMakeLists.txt

@@ -2,7 +2,7 @@ PROJECT(Corpus2Library)
 
 set(corpus2_ver_major "1")
 set(corpus2_ver_minor "3")
-set(corpus2_ver_patch "2")
+set(corpus2_ver_patch "3")
 
 cmake_minimum_required(VERSION 2.8.0)
 

swig/token.i

@@ -31,7 +31,7 @@ namespace Corpus2 {
     Token(const UnicodeString& orth, PwrNlp::Whitespace::Enum wa);
     Token* clone() const;
 
-    Token* create_utf8(const std::string& orth_utf8, PwrNlp::Whitespace::Enum wa = PwrNlp::Whitespace::Space);
+    static Token* create_utf8(const std::string& orth_utf8, PwrNlp::Whitespace::Enum wa = PwrNlp::Whitespace::Space);
     
     const UnicodeString& orth() const;
     std::string orth_utf8() const;