[Lazarus] Release Candidate 2 of Lazarus 1.6

[Juha Manninen]

A note about the Sparta docked form designer. The package is included
in 1.6 release but unfortunately it is not stable there. Many of its
bugs are widgetset dependent.
It has been improved in trunk already by Maciej and Ondrej but it
required changes also in LCL and in source editor. Such changes have a
risk of introducing regressions and could not be merged to 1.6.
AnchorDocking package also got many improvements but is still not perfect.
These features will be improved in trunk and released later (maybe
Lazarus 2.0). There may be other Sparta packages baking, too, and a
new menu designer works already well in trunk.

What if somebody wants to use the docked form designer but is hit by its bugs?
Then he must use trunk, a selected "sweet spot" revision like always
with new features.
Copying the Sparta package from trunk is not enough.

Anyway the new 1.6 release is surely justified and packs lots of goodies:
- FPC 3.0 with all its improvements.
- Improved UTF-8 system.
- Configurable IDE Coolbar
- Desktops feature
- Plenty of smaller improvements around. Read the release notes.

Juha