Merge pull request #5 from myfinder/master

>参加にあたって1本発表させて頂ければと考えております。
大歓迎です。よろしくおねがいします。
Text for Riak Source Code Reading Tokyo #4: reak_core intro
Merge pull request #6 from shino/ss-riak-core-intro

Text for Riak Source Code Reading Tokyo #4: reak_core intro
update latest info
add connpass page for #5
added #5 intro-otp slides.
added #6
Merge pull request #7 from kuenishi/wip-otp-intro

added #5 intro-otp slides.
Update README.rst
add connpass page for #6
added talk title