Make_install.sh can be called in any build directory and will execute
`make install` and all the necessary extra steps after that.
Also, make prepare and finish ordinary steps that can be blocked and
inserted at will. Add reset_steps.
git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@16928 57a11ea4-9604-0410-9ed3-97b8803252fd
