ninjahelper: moved (and enhanced) vservers-related functions to lib/vservers. dup.helper, pgsql.helper: use these functions

 Moved more code to lib/ (conffile-related functions, parseini. Added dup helper, using new modular vservers-related functions shared for all helpers.

 Autotools: when cleaning, delete generated files in lib dir.

 Start to move common functions (maketemp) to lib/tools, and better use autotools for lib/{easydialog,tools}.

 Moved easydialog.sh to lib/ directory: more code is going to be shared, let's start here.