FMDatabase: fixes static analyzer warning, API Misuse (Apple)

FMDatabase.m:207:5: Key argument to 'setObject:forKey:' cannot be nil
Reordered the sequence of source files into a more logical order
Clarify variable argument methods; expand upon rationale behind concerns with executeUpdateWithFormat and executeQueryWithFormat methods
Removed redundant Foundation.framework reference
Minor README correction
Merge pull request #174 from robertmryan/master

Documentation Update re executeUpdateWithFormat and executeQueryWithFormat
Merge pull request #168 from piemonte/master

FMDatabase: fixes static analyzer warning, API Misuse (Apple)
Merge pull request #8 from ccgus/master

同步到最新