- Eliminate discussion of `FMDatabaseQueue` no longer being optional in 2.7, because it actually is.
- Given new Apple guidance regarding "Documents" vs "Application Support", changed Swift example to use the latter instead of the former.

There were several properties that were implemented as simple getter and setter methods, with no formal property definitions, but with manually defined ivars. In Objective-C this isn't problematic (as the Objective-C "dot" notation is merely syntactic sugar), but it leads to an unintuitive interface for Swift. By shifting these manually implemented getter/setters with manual ivars to properties makes the code a little more intuitive, and leads to more natural looking code in Swift (e.g. rather than `let timeout = db.maxBusyRetryTimeInterval()` and `db.setMaxBusyRetryTimeInterval(value)`, we can just do more natural `let timeout = db.maxBusyRetryTimeoutInterval` and `db.maxBusyRetryTimeInterval = value`. Affected properties include `databasePath`, `maxBusyRetryTimeInterval`, `shouldCacheStatements`, `sqliteHandle`, `hasOpenResultSets`, `lastInsertRowId`, `changes`, `goodConnection`, `columnCount`, `resultDictionary`, `applicationID`, `applicationIDString`, `userVersion`, `countOfCheckedInDatabases`, `countOfCheckedOutDatabases`, and `countOfOpenDatabases`.

Also updated documentation for the file URL based methods.

Also a few deprecated methods have been updated with `__deprecated_msg` so that the app developers have a fighting chance to see what the replacement method should be.

Renamed `isInTransaction`.

Fixed a few nullability definitions, e.g. `stringForColumn` (and all the other similar ones that return pointers), `columnNameForIndex`, etc.

The `objectForColumn` (and the associated subscript operator) now returns `nil` if an invalid column name/index is passed to it. It used to return `NSNull`. I've created unit tests that test that.

Updated README

- Audited for nullability;
- Updated `makeFunctionNamed` and added associated utility `value` and `result` methods;
- Added URL methods;
- As adding tests for new methods, expanded test coverage a bit (now over 80% coverage);
- Updated VFS tests to make sure they unregister;

Notably, in `inTransaction`, in Swift 3:

 - the parameters are optionals (because FMDB has not yet been audited for nullability) and
 - `memory` has been replaced with `pointee`.

1. Remove hard coded `/tmp` folder. At the very least, use `NSTemporaryDirectory`. You can also use `URLForDirectory` with `NSItemReplacementDirectory`, but I agree [with NSHipster says](http://nshipster.com/nstemporarydirectory/) that `NSTemporaryDirectory` is fine.
2. Comment out `[db release]` because for 99% of users, now, this isn't appropriate. But `nil` the pointer either way (in MRC, eliminate dangling pointer reference, in ARC, remove your strong reference).

Fix typo for consistency's sake.

Minor typos

The note regarding dragging FMDB files to Swift project was confusing, so I have attempted to clarify.

Thanks to peakman https://github.com/ccgus/fmdb/pull/438 for raising this topic

These renditions are `executeQuery:values:error:` and `executeUpdate:values:error:`.

Updated README, which has Swift 2 example, accordingly.

Replace `println` with `print`

Fix Swift code sample so that it doesn't try to do `stringByAppendingPathComponent` on `String` object (because that method no longer exists). You can use `NSString` or shift to use `NSURL` pattern as suggested here.

syntax highlight objective-c, swift and sql code snippets