Optimize terminating operations

[dekmm]

Some terminal operations can be expressed as a combination of multiple intermediate operations, making them easier to represent in SQL:

• AnyMatch
.anyMatch(p) can be expressed as .filter(p).limit(1).count() > 0)
• NoneMatch
.noneMatch(p) can be expressed as .filter(p).limit(1).count() = 0

Some terminal operations can be enhanced with certain intermediate operations in order to optimize the SQL query that is being executed:

• FindFirst
.findFirst() can be expressed as .limit(1).findFirst() to restrict the size of the ResultSet
• FindAny can be expressed as .unordered().limit(1).findAny()

[julgus]

Work appended to the 'terminal' branch.