Update appveyor and windows build_win script.

Makefile

@@ -159,7 +159,8 @@ clean-natives:
 
 dist: janet-dist.tar.gz
 
-janet-%.tar.gz: $(JANET_TARGET) src/include/janet/janet.h janet.1 $(JANET_LIBRARY)
+janet-%.tar.gz: $(JANET_TARGET) src/include/janet/janet.h \
+	janet.1 LICENSE CONTRIBUTING.md $(JANET_LIBRARY) README.md 
 	tar -czvf $@ $^
 
 clean:

appveyor.yml

@@ -20,6 +20,7 @@ init:
 install:
     - build_win
     - build_win test
+    - build_win dist
     
 build: off
 
@@ -29,25 +30,16 @@ only_commits:
     - src/
 
 artifacts:
-    - path: janet.exe
-      name: janet.exe
-      type: File
-    - path: janet.def
-      name: janet.def
-      type: File
-    - path: janet.lib
-      name: janet.lib
-      type: File
-    - path: src\include\janet\janet.h
-      name: janet.h
-      type: File
+    - path: dist
+      name: janet-%APPVEYOR_TAG_NAME%-windows.zip
+      type: Zip
 
 deploy:
   description: 'The Janet Programming Language.'
   provider: GitHub
   auth_token:
     secure: lwEXy09qhj2jSH9s1C/KvCkAUqJSma8phFR+0kbsfUc3rVxpNK5uD3z9Md0SjYRx
-  artifact: janet.exe
+  artifact: janet-%APPVEYOR_TAG_NAME%-windows.zip
   draft: true
   on:
     APPVEYOR_REPO_TAG: true

build_win.bat

@@ -12,6 +12,7 @@
 @if "%1"=="help" goto HELP
 @if "%1"=="clean" goto CLEAN
 @if "%1"=="test" goto TEST
+@if "%1"=="dist" goto DIST
 
 @rem Set compile and link options here
 @setlocal
@@ -88,6 +89,17 @@ for %%f in (test/suite*.janet) do (
 	@if errorlevel 1 goto :TESTFAIL
 )
 exit /b 0
+
+@rem Build a dist directory
+:DIST
+mkdir dist
+copy janet.exe dist\janet.exe
+copy LICESNE dist\LICENSE
+copy README.md dist\README.md
+copy janet.lib dist\janet.lib
+copy janet.exp dist\janet.exp
+copy src\include\janet\janet.h dist\janet.h
+
 :TESTFAIL
 @echo.
 @echo *******************************************************