use h2o_malloc instead of malloc for allocation-error.
Change plain text to html in doc_root/index.html
Merge pull request #43 from cubicdaiya/use-h2o-malloc

use h2o_malloc instead of malloc for allocation-error.
Merge pull request #44 from suzukaze/change-index.html

Change plain text to html in doc_root/index.html
enphasize the version of libuv