Reorganisation and cleanup of the README, INSTALL and src/INSTALL

files to avoid confusion by the user:

1. Merge the installation and compilation instructions for the manual way from
   top-level README into src/INSTALL because this is the INSTALL file for it.
   Now any information we have about this is there. I've not changed the text
   itself greatly, just merged and adjusted the sentences.

2. Made the same style for INSTALL and src/INSTALL plus cross-hints
   for the user where to find what plus general hint for both files about
   Windows installation.

3. Inserted a new and simple reference to top-level INSTALL file
   under the topic "Installation" to the top-level README file.
   I've also cleaned up the README file a little bit.

Feel free to fix me where I've written down bad english...


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@80774 13f79535-47bb-0310-9956-ffa450edef68