Support current version of dcd

* Update to follow current DCD
`ac-dcd-adjust-cursor-on-completion` is called on completion if the dcd is newer than 4.0. It will make the completion work on this version.

*Bug fix: multiple ac-dcd-flags was not accepted
If more than one ac-dcd-flags were set, they were unescaped and regarded as one flag. Now it's fixed.
Remove unnecessary process

Remove a process which went out of use by the previous commit.
Bug fix

Remove bug of parsing version string.
Bug fix

fix bug of member completion and candidate expansion
Remove tabs and debug corpse

It seems something was wrong with the tab size. Fixed it with the corpses of debug message.
Merge pull request #7 from tsukimizake/master

Support current version of dcd, and a little bug fix