title: adb.exe is not executable. ANDROID_HOME is not set
body: <p>I am successful in taking snapshot and open a activity using monkeyrunner. But what I want is to press a Button. So I am using ViewClient, but whenever I run my jython script the error comes:</p>
  
  <pre><code>File "F:\Example\AndroidViewClient\src\com\dtmilano\android\viewclient.py", line 870, in _init_()
  File "F:\Example\AndroidViewClient\src\com\dtmilano\android\viewclient.py", line 986 in _ViewClient_obtainAdbPath
  </code></pre>
  
  <p>raises exception </p>
  
  <pre><code>('adb="%s" is not executable. Did you forget to set ANDROID_HOME in the environment?' %adb)
  Exception: adb="%s" is not executable. Did you forget to set ANDROID_HOME in the environment?
  </code></pre>
  
  <p>Thanks in Advance</p>