Add CHANGELOG script facility.
Add CHANGELOG script facility.

Should be quite manageable and very simple to use: just specify a git log
expression such as "v1.0.0..v1.0.1" to generate it, if expression is omitted
then a full log will be generated (required git2cl!).

It will also try to filter out mail address and transform the "@" (at) sign
to an "[at]" string, not sure how many spammers this thing will fool btw :P

MonsterOfCookie/libgdx-contribs,manuelbua/libgdx-contribs,langurmonkey/libgdx-contribs,klaus7/libgdx-contribs,PatrikMaier/libgdx-contribs,MonsterOfCookie/libgdx-contribs,langurmonkey/libgdx-contribs,klaus7/libgdx-contribs,PatrikMaier/libgdx-contribs,manuelbua/libgdx-contribs