Fix load error message on Linux, fix documentation, and cleanup whitespace

[cvoltz]

These patches:

1. Fix load error on Linux

   On Linux systems, the DOS EOL terminators cause the plugin to fail to
   load. Replace the DOS EOL (LF CR) with UNIX EOL (LF) so the plugin will
   load correctly on both Linux and Windows. Also, remove trailing
   whitespace.

2. Fix documentation

   Modify the text in the README and the plugin to be the same. Looks like
   they were originally the same but drifted apart over time.

   Fix several grammar and spelling mistakes.

   Modify layout of text in a few places to line things up better.

3. Convert tabs to spaces

   Convert tabs to spaces so the files will look the same in all editors
   irrespective of the user's editor preferences. The original files used
   4 space tabs but that wasn't documented anywhere.