Move the documentation files to root directory.
Don't free master_ob when error on connect().

This cause driver to crash.
Do not omit frame pointers in any build.

This allows a meaningful backtrace for nearly no cost.
Always initilize parse node before handing out.

This prevent memory corruption on parse error cases.
Adding comments about old code for new options.
Adding specfic comment for choosing compile mode.
Release 2.27-sunyc-rc1
Merge pull request #72 from sunyc/master

2.27-sunyc-rc1