image repository support

 * Repository_t class + basic functionality
 * compiled with boost - from ports (statically)
dvel

    * some repo development
    * crash/freeze fix
ns-array-of
improve window behavior

    * mouse hides on next
    * border hides on next, unhide on mouse move
xqiv/ns-array-of.h
devel

    * menu removed
    * border behavior improved
on cache clear() reset pivot to 0
Merge remote-tracking branch 'remotes/github/master'