Correct doc/install.txt to refer to INSTALL_OPTIONS instead of PREFIX.

This catches the docs up with the changes made in:
  commit a7ad89a6ad7da55089e6f9a4cdd645b7079ee04e
  Author: W. Trevor King <wking@drexel.edu>
  Date:   Sat Apr 16 21:26:02 2011 -0400

1 files changed, 2 insertions, 6 deletions

diff --git a/libbe/util/encoding.py b/libbe/util/encoding.py
index 77d62fc..8663744 100644
--- a/libbe/util/encoding.py
+++ b/libbe/util/encoding.py
@@ -51,14 +51,10 @@ def get_input_encoding():
 def get_output_encoding():
     return sys.__stdout__.encoding or get_encoding()
 
-def get_filesystem_encoding():
+def get_text_file_encoding():
     """Return the encoding that should be used for file contents
-
-    Note that `sys.getfilesystemencoding` returns the prefered
-    encoding for file *names*, and we're assuming that this is also
-    the prefered encoding for their contents.
     """
-    return sys.getfilesystemencoding() or get_encoding()
+    return 'utf-8'
 
 def get_argv_encoding():
     return get_encoding()