Buildbot CMake update to 2.6.3?

[hoijui]

In The pureint branch of spring, i am using the SOURCES attribute of the ADD_CUSTOM_TARGET() CMake command. It is used for the JavaOO wrapper and for Java AIs. This attribute got added to CMake in version 2.6.3. It is a really useful thing, as it makes Java compilation as smooth as native compilation (or very close): Recompiling stuff only when needed, and always when needed. I have added a check for the required CMake version, so when it is older then 2.6.3, JavaOO and Java AIs are not configured/compiled, and warnings are shown.
Bibims buildbot uses CMake 2.6.0 (current Debian stable). 2.6.3 was released on 23. February 2009, current release is 2.8.0. Gentoo stable is 2.6.4, i do not know about other distros.
The pureint branch is not yet ready to be merged into master, but not a lot is missing. Bibim said he would not mind a lot to upgrade his machine to a later CMake version. So the question is, would it be ok to require this version for Java AIs, and upgrade CMake on the buildbot?