fixed auth by password and maybe captcha challenge
add: settings for prosody in example config
add: whitelist example in example config
fix: whitelist feature
fix: error message in whitelist
fix: url field type changed to text-single (xep-0004)
fix: write pid-file at start and remove it at end works
chg: default avatar and gateway logo
fix: transparency at gateway logo
fix: transparency at gateway logo, reduce file size
add: ipv6 support in xmpppy
fix: ipv6 support in xmpppy
chg: gateway logo
Merge pull request #10 from disabler/master

fix-pack by diSabler
add: client-side captcha
add: correct disco items answer
add: xmpppy debug
Merge branch 'master' of https://github.com/mrDoctorWho/vk4xmpp
fix: debug xmpppy with old config
del: timestamp in captcha
add: url in vcard
add: answer for jabber:iq:version
add: iq ping (xep-0199)
add: iq uptime (xep-0012)
fix: exception in client-side captcha
Merge pull request #12 from disabler/master

client-side captcha, disco#items, iq-ping  — all by @diSabler
fix: gateway revision
Merge branch 'master' of https://github.com/mrDoctorWho/vk4xmpp
* some code cleanup in gateway
* parts of code deleted or moved into modules
* now transport should not write null exceptions
! update may cause errors, revision didn't tested well