Updated the default mapping of Int64 to NUMBER(19,0) to match the default type mapping used by Oracle.

See Table 3-4: Mapping of Oracle Data Types and EDM Types (http://docs.oracle.com/cd/E11882_01/win.112/e18754/featLINQ.htm)
Issue #388 : Added rake support for building the FluentMigrator.Runners package when the nuget:package task is invoked
Allow data to be inserted using a dictionary and refactor existing code closes #458
Update MySqlTypeMap.cs

version 1.1.2 causes error when migrating 'versioninfo' table by adding a 'description' column on MySQL database.
This error caused by method 'Up' in 'VersionDescriptionMigration' class. The method calls .AsString(int.MaxValue) which is beyond 
definition in MySqlTypeMap class
-Added DefaultExistingRowsTo fluent command when creating columns for existing tables.
-Added a ColumnExpressionBuilderHelper to centralise some of the duplicated functionality in the Column related Expression Builders.
-Added VS2013 solution file
-Refactored Unique Column common logic into shared ColumnExpressionBuilderHelper class, refactored tests.
-Removed any reference to ExistingRowDefault, renamed to SetExistingRowsTo, to address confusion with this being related to db engine defaults.
-Refactored Indexed() call out of individual column expression builders into central location.
Lazy loading migrations
added LazyLoader;
Added Constraint("name").Exists() to SchemaTable syntax
Fixes solution project change
Add tests for constraint schema check
Merge pull request #1 from matthewdunsdon/ConstraintExists

Constraint exists work fixups
Added UnitTest for Index Exists
Added Default SystemMethods.CurrentDateTime for Oracle Backend Generator (maps to oracle keyword CURRENT_TIMESTAMP)

http://docs.oracle.com/cd/B28359_01/server.111/b28286/functions038.htm#SQLRF00629
Added SchemaName to Create, Insert and Delete Table operations for Oracle generator backend
changed oracle tests to correctly check custom schema in Create, Insert, Delete
edge case for "IsQuoted" method in Generators/Generic/GenericQuoter.cs:
method IsQuoted if parameter passed is null or empty returns false (because it is not quoted...)
Fixed Insert tests from OracleDataTests.cs