MySQLDialect.cs: Fix line endings.
MySQLDialect.cs: Define power to return double to harmonize with other dialects (makes use of Math.Pow() in Linq queries work). NH-3381.
ArrayHelper.cs: Function documentation.
MsSql2000Dialect.cs: Add support for the power() function. NH-3553.
PagingTests.cs: Fix line endings.
PagingTests.cs: Ignore tests that rely on bounded subqueries on MySQL, since it doesn't support LIMIT on subqueries used within the IN-clause.