Initial work on ToEnum && ToInt
Merge branch 'master' of https://github.com/0xdata/h2o into sai-enum_int
update to track h2o-perf not Perfor...
first try at the ToEnum hack
*TypeChange has two classes:
  1. TypeChange
  2. CollectDomainVA
Merge branch 'master' of https://github.com/0xdata/h2o into sai-enum_int
Merge branch 'master' of https://github.com/0xdata/h2o into sai-enum_int
Merge branch 'master' into sai-enum_int
Added back-end for toEnum on value arrays.
Merge branch 'sai-enum_int' of github.com:0xdata/h2o into sai-enum_int
Merge branch 'master' of github.com:0xdata/h2o
toEnum backend bug fix. set min/max to 0/dom.length.