FMResultSet resultDict return lower case string key

[hanchao]

OPEReferencePoi initWithSqliteResultDictionary can not get correct values

see https://github.com/ccgus/fmdb/issues/53

 /* Returns a dictionary of the row results mapped to case sensitive keys of the column names. */
- (NSDictionary*)resultDictionary;

/* Please use resultDictionary instead.  Also, beware that resultDictionary is case sensitive! */
 (NSDictionary*)resultDict  __attribute__ ((deprecated));