readme tweaks

WiX/readme.md

@@ -23,22 +23,19 @@ versioncache.dat. Newer packages MUST ALWAYS have a higher version number than
 the one contained in this file. Commit to SVN after building a new package to
 ensure versioncache.dat is updated.
 
-Note that you have to have the Windows Installer XML (WIX) toolset installed,
-as well as the Win32 extensions for Python module. Get both from:
+Note that you have to have the [Windows Installer XML (WiX) toolset](http://wixtoolset.org) installed,
+as well as the [Win32 extensions for Python](https://sourceforge.net/projects/pywin32/).
 
-http://wix.sourceforge.net
-http://sourceforge.net/projects/pywin32/
-
-Testing
+# Testing
 
 The best test of a newly compiled installation package is installation on a
 virgin Windows XP, e.g., via VirtualPC/Windows XP Mode on Windows 7. PyNcView
 should install correctly, and open NetCDF and HDF4 files correctly. It is also
 recommended to test the mapping/projection functionality.
 
-Potential pitfalls
+# Potential pitfalls
 
-Python's distutils appears to grab necessarily DLLs wherever it finds them in
+* Python's distutils appears to grab necessarily DLLs wherever it finds them in
 the system path. On 64-bit systems, this may lead to 64-bit DLLs being included
 in the 32-bit package, thus breaking pyncview on any other system (it may still
 run on the 64-bit system!). This has been observed for zlib1.dll.