Update inital version to 2.7.2

- The initial version is the version of boot that is installed when
  boot.sh is run for the first time ever on a machine (i.e. Boot not
  already installed).

boot.properties

@@ -1,6 +1,6 @@
 #https://github.com/boot-clj/boot
 #Sun Nov 15 17:35:18 EST 2015
-BOOT_VERSION=2.5.2
+BOOT_VERSION=2.7.2
 BOOT_CLOJURE_VERSION=1.7.0
 BOOT_CLOJURE_NAME=org.clojure/clojure
 BOOT_EMIT_TARGET=no

src/Boot.java

@@ -11,15 +11,15 @@
 import java.util.regex.Pattern;
 import java.lang.reflect.Method;
 import static java.nio.file.StandardCopyOption.*;
-    
+
 @SuppressWarnings("unchecked")
 public class Boot {
 
-    public static final String            initialVersion = "2.5.2";
+    public static final String            initialVersion = "2.7.2";
     public static final File              homedir        = new File(System.getProperty("user.home"));
     public static final File              workdir        = new File(System.getProperty("user.dir"));
     public static final ParentClassLoader loader         = new ParentClassLoader(Boot.class.getClassLoader());
-    
+
     public static File
     mkFile(File parent, String... kids) throws Exception {
         File ret = parent;