[Halld-offline] standardized build

[Matthew Shepherd]

Hi all,

We discussed Wednesday that we wanted to move hdds to scons.

We also discussed removing Makefiles.

I'd suggest having "targets" configured in a standardized way also.

For example, ccdb has no install target.

Procedure:

ccdb:  scons
jana: scons install
hdds:  make
sim-recon: scons install  

user plug-ins:  scons install

I've been bitten a few times by forgetting to type install
and running stale code.

While I think install should be the default target since it is the most
likely mode of operation for users, the simplest, and therefore
the most user friendly, I understand that people may want
to build code and not use it.. (? maybe ? .. why isn't it installed 
by default?)  So if we want to explicitly type scons install
that is fine, but I'd argue for a consistent invocation for all
packages if possible.  

Maybe the new master build system Paul and Mark
are working on will take care of all this.

Matt