Add RubyKaigi 2013 stuffs

Added data files of RubyKaigi 2013 speakers.

- data/rubykaigi2013_crigor.yaml:  http://farm9.staticflickr.com/8554/8890820668_9930a7e70b_b.jpg
- data/rubykaigi2013_enebo.yaml:  http://farm3.staticflickr.com/2864/8890223419_218f9741c0_b.jpg
- data/rubykaigi2013_headius.yaml:  http://farm3.staticflickr.com/2857/8890843660_07a1115971_b.jpg
- data/rubykaigi2013_hone.yaml:  http://farm4.staticflickr.com/3721/8890240131_07f9d6e9fa_b.jpg
- data/rubykaigi2013_ko1.yaml:  http://farm4.staticflickr.com/3768/8890230607_4de0873f85_b.jpg
- data/rubykaigi2013_lrz.yaml:  http://farm4.staticflickr.com/3814/8890205705_010c1a0fd2_b.jpg
- data/rubykaigi2013_matz.yaml:  http://farm9.staticflickr.com/8129/8890815834_947d0bfe1b_b.jpg
- data/rubykaigi2013_shugo.yaml:  http://farm4.staticflickr.com/3766/8890243179_a16635b7a2_b.jpg
- data/rubykaigi2013_takahashim.yaml:  http://farm8.staticflickr.com/7433/8890771870_5081d6bfeb_b.jpg
- data/rubykaigi2013_watson1978.yaml:  http://farm4.staticflickr.com/3751/8890210451_1cd3c75eba_b.jpg