Fix issue 18: Installation link loops (oops!)

See issue 18 on GitHub:
  #18

Author: xolox

README.md

@@ -1012,4 +1012,4 @@ This software is licensed under the [MIT license] [].
 [plugins]: http://peterodding.com/code/vim/
 [Vim Online]: http://www.vim.org/scripts/script.php?script_id=4597
 [vim-tools]: http://peterodding.com/code/vim/tools/
-[howto-install]: https://github.com/xolox/vim-misc/blob/master/README.md
+[howto-install]: https://github.com/xolox/vim-misc/blob/master/INSTALL.md

autoload/xolox/misc.vim

@@ -1,7 +1,7 @@
 " The version of my miscellaneous scripts.
 "
 " Author: Peter Odding <[email protected]>
-" Last Change: April 1, 2015
+" Last Change: April 28, 2015
 " URL: http://peterodding.com/code/vim/misc/
 
-let g:xolox#misc#version = '1.17.4'
+let g:xolox#misc#version = '1.17.5'

doc/misc.txt

@@ -1186,7 +1186,7 @@ This software is licensed under the MIT license [15]. © 2015 Peter Odding
 References ~
 
 [1] http://peterodding.com/code/vim/
-[2] https://github.com/xolox/vim-misc/blob/master/README.md
+[2] https://github.com/xolox/vim-misc/blob/master/INSTALL.md
 [3] http://peterodding.com/code/vim/tools/
 [4] http://peterodding.com/code/vim/easytags/
 [5] http://peterodding.com/code/vim/misc/