milter manager

A bug fix release of 2.0.0.

=== milter manager

==== Improvements

* Support SIGUSR1 signal to reopen log file

==== Fixes

* Drop functionality to report stack trace on crash.
Because it is unsafe for all users. [GitHub #38]

=== milter-core

==== Improvements

* Support log output by MILTER_LOG_PATH environment variable.

=== milter-client

==== Improvements

* Support --log-path option.

=== Ruby milter

==== Improvements

* Support --log-path option.
* Support SIGUSR1 signal to reopen log file.

=== Package

==== Improvements

* Drop Ubuntu Lucid (10.04) support.
* Add Ubuntu Saucy (13.10) support.
* deb: Support Ruby 2.0.0 detection on Debian.
* rpm: Update Ruby1.9.3 package for CentOS6 to Ruby1.9.3-p484.
* Remove auto-generated files from distribution archive.
[Reported by Youhei SASAKI][milter-manager-users-ja:00225]

=== Document

==== Improvements

* Update to the latest milter-greylist RPM.
[Reported by ishizaka tadanori][milter-manager-users-ja:00220]
* Improve English version reference manual.
[GitHub #17]

=== Thanks

* Youhei SASAKI
* ishizaka tadanori