fix of bin/start.sh hangs by redirecting output to the null device.
Merge pull request #36 from hobinyoon/master

fix of bin/start.sh hangs by redirecting output to the null device.
fix of the bin/format.sh error.
fix of the java.lang.IncompatibleClassChangeError. align libasm version to Spark.

scala> val s = sc.textFile("/mnt/tachyon/hit_data.tsv.500000").cache()
13/07/25 17:23:19 INFO storage.MemoryStore: ensureFreeSpace(56883) called with curMem=0, maxMem=1358297825
13/07/25 17:23:19 INFO storage.MemoryStore: Block broadcast_0 stored as values to memory (estimated size 55.5 KB, free 1295.3 MB)
java.lang.IncompatibleClassChangeError: class spark.InnerClosureFinder has interface org.objectweb.asm.ClassVisitor as super class
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:788)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:447)
        at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
        at spark.ClosureCleaner$.getInnerClasses(ClosureCleaner.scala:86)
        at spark.ClosureCleaner$.clean(ClosureCleaner.scala:106)
        at spark.SparkContext.clean(SparkContext.scala:747)
set components' versions
Merge branch 'perf' of github.com:hobinyoon/tachyon into perf