added quick bootstrap script for windows

build.bat

@@ -0,0 +1,20 @@
+
+if not exist "csources"(
+	git clone --depth 1 https://github.com/nim-lang/csources.git
+)
+
+cd "csources"
+if exist "C:\Program Files (x86)" (
+	call build64.bat
+) else (
+	call build.bat
+)
+
+cd ".."
+
+./bin/nim c koch
+./koch boot -d:release
+
+xcopy /Y install.bat.template install.bat
+
+pause

install.bat.template

@@ -0,0 +1,6 @@
+
+if not "%1"=="" (
+	./koch install %1
+) else (
+	./koch install
+)