Factor overriding settings which must be determined at runtime that the user
didn't specify into a separate function.


git-svn-id: svn+ssh://svnrepo/projects/tachyon/trunk@7046 561c3618-0fe6-0310-b5d6-fc65c73fee30
Add the options to set a session name and choose a name if none is given.


git-svn-id: svn+ssh://svnrepo/projects/tachyon/trunk@7047 561c3618-0fe6-0310-b5d6-fc65c73fee30
Add the TACHYON_SESSION and TACHYON_BUFNUM environment variables to the newly
started shells


git-svn-id: svn+ssh://svnrepo/projects/tachyon/trunk@7048 561c3618-0fe6-0310-b5d6-fc65c73fee30
Add a basic test which tests the TACHYON_* environment variables


git-svn-id: svn+ssh://svnrepo/projects/tachyon/trunk@7049 561c3618-0fe6-0310-b5d6-fc65c73fee30