first stab at access overhaul
add support for sqlite image pyramids
a few bug fixes, but still prob w/ sqlite over NFS
forgot to put error checking back
Added hdf5 as a storage container option.
done with access refactoring; now fixing pyramid
forgot to add pyramid template
Added response header to allow http caching
Fixed blank tile bug.
final pyramid cleanup
Merge branch 'access'
updated screenrc files