add @yasulab
add @machida
add @akiinyo
Add gutskun
Merge pull request #122 from murokaco/master

add @yasulab,@machida,@akiinyo
Fix notation of corporation name
Add takedasoft
Add Sendai RubyKaigi01
Add arton
Add sikachu and komagata
Fix url and rename
Merge pull request #124 from machida/sikachu_komagata

Add sikachu and komagata
Merge pull request #123 from koichiro/add-tohoku

Add tohoku
Merge pull request #125 from koichiro/add-arton

Add arton
Add RubyKaigi 2013 stuffs
Merge pull request #126 from takai/rubykaigi2013_1st_day

Add RubyKaigi 2013 stuffs
Fix photo URLs

I accidentally deleted the photos on flickr