edit the welcome just a bit

a little more detail
links to register, etc
Merge pull request #731 from littleidea/pitt

edit the welcome just a bit
renames 'old' sponsor doc
adds new version of sponsor doc
Merge pull request #732 from ksatirli/master

updates sponsor doc
new sponsor sdl Silver
Merge pull request #733 from drozer/master

new sponsor sdl Silver
[ljubljana 2014] add klika to special sponsors
Merge pull request #734 from extraordinaire/master

[ljubljana 2014] add klika to special sponsors
adds proposal for Michael Ducy
Merge pull request #735 from ksatirli/master

adds proposal for Michael Ducy
changes type of event
Merge pull request #736 from ksatirli/master

changes type of event
new sponsor Pine
Merge pull request #737 from drozer/master

new sponsor Pine
registration is open on homepage
freaking typo
Merge pull request #738 from drozer/master

registration is open on homepage
type is talk not event
Merge pull request #739 from ksatirli/master

type is talk not event