Changes:
* Date and Timestamp are now distinct with all Dates before all Timestamps.
* Numeric comparisons now correctly handle Doubles and Long > 2**53.
* CodeWScope doesn't strcmp BSONObjs or strings which may contain NULs.
There should be no changes in any of the cases where woCompare defined a
correct total ordering before. The new behavior matches the ordering defined
by KeyString.
Related tickets:
* SERVER-3304 Error comparing Date and Timestamp
* SERVER-3719 Total ordering over Longs and Doubles
* SERVER-7804 CodeWScope comparisons are broken
* SERVER-16632 Change WiredTiger index key format
Changes to the comparison function for aggregation will be handled separately
as SERVER-16708.
The actual change is in src/mongo/shell/collection.js with the remaining changes
to adjust tests to the new api.
The "ideal" arguments are now an array of pipeline ops and an optional object
with extra top-level options for the command (such as {explain: true}. For
backwards compatibility, we still support the varargs style where each argument
is a pipeline stage, but there is no way to specify extra parameters in this
mode.
Minimal support means conversion to/from BSON, comparison and hashing.
This means that they can be passed through the pipeline correctly, used
in $sort, and used in _id expressions in $group.
SERVER-4608 - Binary pass through
SERVER-5718 - Code/CodeWScope pass through
SERVER-6470 - Don't convert Regex to String
SERVER-7185 - Symbol support
