SQLiteTableOperations

##Overview SQLiteTableOperations exposes an interface for table operations.

##Create Table Creates a table associated with the model if it doesn't already exist.
Executes on current thread and on background thread respectively.

static func createTable() throws -> Void
static func createTableInBackground(completion: Completion?)

##Create Index Creates a index on the model's table if it doesn't already exist.
Executes on current thread and on background thread respectively.

static func createIndex(columns: [Expressible], unique: Bool) throws -> Void
static func createIndexInBackground(columns: [Expressible], unique: Bool, completion: Completion?)

##Drop Table Drops the table associated with the model.
Executes on current thread and on background thread respectively.

static func dropTable() throws -> Void
static func dropTableInBackground(completion: Completion?)

---

public protocol SQLiteTableOperations {
    static func createTable() throws -> Void
    static func createTableInBackground(completion: Completion?)
    
    static func createIndex(columns: [Expressible], unique: Bool) throws -> Void
    static func createIndexInBackground(columns: [Expressible], unique: Bool, completion: Completion?)
    
    static func dropTable() throws -> Void
    static func dropTableInBackground(completion: Completion?)
}