Merge pull request #4 from kikito/ngx_1_5_8_1

updated to openresty 1.5.8.1
openresty 1.5.x uses bundled luajit automatically

it is luajit 2.1 and in homebrew there is just 2.0
more debbuging flags for --with-debug mode
updated to openresty 1.5.11.1
Merge pull request #5 from kikito/ngx_1.5.11.1

updated to openresty 1.5.11.1