[LightDM] Version 1.0.2 released

[Robert Ancell]

Fixes a number of important bugs, recommend all to update:

Overview of changes in lightdm 1.0.2

    * Fix daemon from blocking if Accounts Service does not exist
    * Fix greeter log file not being written
    * Don't set LANG environment variable if using Accounts Service.
    * Fix gdmflexiserver not working due to it not being in PATH
    * Don't authenticate the greeter user
    * Allow greeters to be disabled in configure flags
    * Fix over allocation of read buffer in greeter protocol
    * Make sure objects are cleaned up on exit
    * Fix minor memory leaks
    * Fix hugely oversized allocation in greeter buffer.  Can trigger
      crashes when entering very long passwords.