A default config.yml file is now always created whenever the plugin is loaded
and there isn't one yet, to cut down on confusion and draw attention to the
configuration possibilities.
Added new option to restrict power blocks (the support blocks directly
underneath the bridge through which the redstone power is delivered to the
bridge) to certain types of block. This achieves a few goals:
Make it more difficult to build bridges by having to use scarce resources in
building them.
Make it easier to use a common material for the bridge itself, since the
chance of bits of floor flying off accidentally because there is redstone
nearby is smaller if the power block has to be a rare block.
Slightly improve the performance of the plugin.
Added new option to disallow "floating" bridges, stopping people from sending
bridges off into the blue sky either by accident (because they forgot to build
a stop block) or on purpose. Note that this only refers to floating on air;
even when you disable this bridges can still float on water and lava, so you
can still build ferries.
