Evaluate window aggregates only once for each partition

Move more code from Aggregate and JavaAggregate to AbstractAggregate

Add experimental implementation of grouped window queries

Refactor OVER() processing code and fix some issues

fix : The french messages are bad genereted (not contains DB message)

Error messages are translated in `org.h2.message.DbException` by using `MessageFormat.format` method.
But the french messages are not well generated by `MessageFormat`(`{X}` are  not replaced by `param` entry). 
That is normal, because they are not well formated : the single quote wasn't been escape
This PR solves this issue by escaping the french sentences for MessageFormat.

Java documentation of MessageFormat : https://docs.oracle.com/javase/8/docs/api/java/text/MessageFormat.html
An extract:
```
Within a String, a pair of single quotes can be used to quote any arbitrary characters except single quotes. For example, pattern string "'{0}'" represents string "{0}", not a FormatElement. A single quote itself must be represented by doubled single quotes '' throughout a String. For example, pattern string "'{''}'" is interpreted as a sequence of '{ (start of quoting and a left curly brace), '' (a single quote), and }' (a right curly brace and end of quoting), not '{' and '}' (quoted left and right curly braces): representing string "{'}", not "{}". 
```

Use PostGIS-compatible format for SRID-only constraint in GEOMETRY

Add experimental unoptimized support for OVER ([PARTITION BY ...]) in aggregates

Add GEOMETRY type subtypes with type and SRID constraints