add ABR brushes and presets with properties and patterns

src/util.cpp

@@ -313,6 +313,17 @@ std::string wstr2str(const std::wstring & wstr)
     return converted;
 }
 
+bool str_iequals(const std::string& a, const std::string& b)
+{
+    unsigned int sz = a.size();
+    if (b.size() != sz)
+        return false;
+    for (unsigned int i = 0; i < sz; ++i)
+        if (std::tolower(a[i]) != std::tolower(b[i]))
+            return false;
+    return true;
+}
+
 static const char* gl2str(GLenum err)
 {
     switch (err)