FMDB: now with more documentation!

[davedelong]

There are several changes in these commits:

• Method to validate a SQL statement (-[FMDatabase validateSQL:error:]). Returns YES if the passed SQL is valid, NO otherwise.
• Added method to retrieve the number of columns in a result set (-[FMResultSet numberOfColumns])
• Added methods to execute a query or update with an NSString-style format string. (-[FMDatabase executeQueryWithFormat:] and -[FMDatabase executeUpdateWithFormat:]). This allows you to not worry about boxing non-object values in NSNumbers before passing them in to FMDB. For example: [db executeUpdateWithFormat:@"insert into myTable values (%d, %s)", 42, "simple string"];
• Renamed -[FMResultSet objectForColumnName:] to -[FMResultSet objectForColumn:] to be consistent with the other similar methods
• Wrote some documentation! Hooray!

You may need to do a bit of formatting cleanup, but on the whole I believe the changes are worthwhile. :)

[giovatardu]

Great,

Thank you!

[ccgus]

Sorry I haven't pulled this yet- I got awful busy recently. I try to get to it asap though.

[giovatardu]

cool ;)

[ccgus]

Finally got this done. Did you write any tests at all for executeUpdateWithFormat? I'd like to add them to main.m if you did.