[trivial] allow user to configure DESTDIR
Increment version to 4.3.1.
Merge pull request #37 from dnozay/destdir

[trivial] allow user to configure DESTDIR
Re-generate configure script with autoconf.
The mod_wsgi-express install-module command was not installing into the Apache modules directory. #38
Missing release notes for 4.3.1 from previous commit.
Incorrect variable description on mod_wsgi-express command line help.
Add the --add-handler option to mod_wsgi-express for custom resource handlers.
Fix resource automatic reloading checks in mod_wsgi express.
Add missing documentation about pyvenv support in 4.2.8 release notes.
Fix up configure script for MacOS X 10.10.
Add release notes for MacOS X Yosemite build fixes.
Add limits on amount of response data that is buffered when proxying. #51
Release notes for proxy buffering limits. #51
Merge branch 'release/4.3.1'