[IMP] updated changelog file for 5.0.6 release

bzr revid: olt@tinyerp.com-20090922111815-je0c161jzeoeeaqn

[FIX] Sale : Delivery Date delay computation made corrected when days…

… are passed with fractions

lp bug: https://launchpad.net/bugs/419720 fixed

bzr revid: jvo@tinyerp.com-20090922064256-b9nk9ruk8xctv3ho

[IMP] updated release.py to 5.0.5

bzr revid: olt@tinyerp.com-20090917135346-9vylvoy89xoffkep

[FIX] Purchase_manual : certificate on terp displayed wrong value

bzr revid: jvo@tinyerp.com-20090917130529-vdzbrr2u2yx4gjeq

[REL] 5.0.4

bzr revid: christophe@tinyerp.com-20090828165855-461psr84dugkzvp7

[MERGE]

bzr revid: christophe@tinyerp.com-20090828164312-x6j4etkj67b6txpi

[REL] 5.0.3

bzr revid: christophe@tinyerp.com-20090821152731-0utzy021ac629lbx

[REL] 5.0.3

bzr revid: christophe@tinyerp.com-20090821153034-u8l2xveibp0osy7j

[REL] 5.0.2

bzr revid: christophe@tinyerp.com-20090812095443-6mweuxhguci0o6vc

[REL] 5.0.2

bzr revid: christophe@tinyerp.com-20090812095704-2e11yfpkywqn1lew