Changes to 'dev/disable_todoview'

[Sandro Knauß]

New branch 'dev/disable_todoview' available with the following commits:
commit 0f41be41eff0807b1b04c8f237c5c707cf8ec802
Author: Sandro Knauß <knauss at kolabsys.com>
Date:   Sat Nov 22 10:05:47 2014 +0100

    Disable todo plugin for kontact
    
    like add_optional_sub_directory the plugin can be disabled with:
    DISABLE_ALL_OPTIONAL_PLUGINS and can be disabled bia BUILD_todo /
    BUILD_kcm_todo