Remove Windows build files and mentions, will not work with regex usage

Author: chad-iris

ChangeLog

@@ -1,3 +1,9 @@
+2017.136: 3.7
+
+	- Remove Windows/Watcom build files and documentation, this will not build
+	on Windows with the current uses of system regex usage.
+	- Update licensing to GNU GPL 3.
+
 2015.062: 3.6
 	- Update libmseed to 2.14.
 	- Read any leap second list file indicated by the LIBMSEED_LEAPSECOND_FILE

Makefile.wat

@@ -17,9 +17,6 @@ In most environments a simple 'make' will build the program.
 The CC and CFLAGS environment variables can be used to configure
 the build parameters.
 
-In the Win32 environment the Makefile.win can be used with the nmake
-build tool included with Visual Studio.
-
 ## Licensing
 
 GNU GPL version 3.  See included LICENSE file for details.