Rename RELEASE to BUILD_GUIDE and prepare-for-oss to build-aux

BUILD_GUIDE is more future-proof, especially if we end up using the preprocessor.

The build-aux rename is preparatory work for the next changes.

AVsitter2/prepare-for-oss.py

@@ -1,35 +0,0 @@
-#!/usr/bin/env python
-# coding: utf8
-
-import sys, re
-
-def prterr(s):
-    sys.stderr.write(s + "\n")
-
-def main(argc, argv):
-    if argc < 2:
-        prterr(u'Need exactly 1 argument (input filename)')
-        return 1
-
-    # Regex that replaces a line with its OSS version when one's specified.
-    os_re = re.compile(r'^( *)(.*?)// ?OSS::(.*)$', re.MULTILINE)
-
-    f = open(argv[1], "r");
-    s = f.read()
-    f.close()
-    # The U+FFFD character that AVsitter uses causes problems in OpenSim.
-    # Replace it with U+001F (Unit Separator) which works fine.
-    s = s.replace(b'\xEF\xBF\xBD', b'\x1F')
-
-    # UUIDs in OpenSim
-    s = s.replace('f2e0ed5e-6592-4199-901d-a659c324ca94', '206fcbe2-47b3-41e8-98e6-8909595b8605')
-    s = s.replace('b30c9262-9abf-4cd1-9476-adcf5723c029', 'b88526b7-3966-43fd-ae76-1e39881c86aa')
-    # TODO: Replace LockGuard texture UUIDs
-
-    s = os_re.sub(r'\1\3', s)
-    sys.stdout.write(s)
-    return 0
-
-ret = main(len(sys.argv), sys.argv)
-if ret is not None and ret > 0:
-    sys.exit(ret)