v4.6.0

• AdbClient: Added isLocked() method to check if screen is locked
• Fixed #55: drag doesn't work for old Android versions
• Removed sys.path manipulation not needed for python
• Read ANDROID_ADB_SERVER_PORT environment variable to set adb PORT. This variable is set by Jenkins Android Emulator plugin.
• Merge pull request #56 from knorrium/clean-whitespaces
• Check for sys.executable that may be not available on Windows
• Examples modified to use python
• Marked jar file creation as deprecated
• Improved UTF-8 treatment in messages
• AdbClient.startActivity() raises exception on errors
• Warns if modules are imported using 'monkeyrunner'
• Added image comparison
• Decode used only on python's 8-bit strings
• Restored obtainAdbPath() used for android API <= 16
• Trap exception generated by integer division by zero in takeSnapshot()
• Fixed famebuffer exception