* find_i function for case insensitive searching

* card::contains uses case insensitive find
* Added card::contains_words for quick search, which searches for each word separately

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@1484 0fc631ac-6414-0410-93d0-97cfa31319b6

src/util/string.hpp

@@ -199,6 +199,9 @@ bool is_substr_i(const String& str, size_t pos, const Char* cmp);
 /// Return whether str contains the string cmp at position pos, case insensitive compare
 bool is_substr_i(const String& str, size_t pos, const String& cmp);
 
+/// Case insensitive string search, returns String::npos if not found
+size_t find_i(const String& heystack, const String& needle);
+
 /// Compare two strings for equality, b may contain '_' where a contains ' '
 bool cannocial_name_compare(const String& a, const Char* b);