Proof of concept remote builder of clean Gentoo tree to provide on demand binary packages to desktop and
laptop comptuers. 

 - This will not work with presence of any significant unstable packet.
    * For instance, unstable firefox depends on unstable "nss-3.45". After update it is replaced in portage
    with "nss-3.46". Either full "nss-3.*" branch should be unmasked (which may bring its own problems or the
    manual intervention is required)
 - Even with stable tree, there are pereodically circular dependencies (always during the bootstrap phase)
 
 
Idea:
 - Create 'Bootstrap' image, i.e. Gentoo image with all configuration. Solved circular dependencies ready to build
    make bootstrap
    make check
    
 - Instantiate 'Builder', i.e. synced configs and portage tree
    make builder
    make bash

 - Update builder to integrate latest configuration/portage changes
    make update
    make bash
    
 - Start building
    make build
    make logs
    
    
 It will build packages and put it on the attached volume. If crashed and restarted, he will first re-use already
 built binaries and, then, will continue compilling. This requires fast storage and will not play well with overlayfs.
 I guess lvm based stuff is necessety.