Added Configure check to test if posix mq_open works.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2410 ba6dc0ae-232f-0410-883f-9ebac64fc565
Configure.ac: Added AC_CHECK_PROG(ps...) for autotest.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2411 ba6dc0ae-232f-0410-883f-9ebac64fc565
Install programs, headers, etc. with correct permissions.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2412 ba6dc0ae-232f-0410-883f-9ebac64fc565
Added man pages for dmtcp_ssh, dmtcp_discover_rm, etc.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2413 ba6dc0ae-232f-0410-883f-9ebac64fc565