nearly at temporal atomic data

still to do:
  make reader choose and return only nearest time to request
  make writer create a temporal collection and append to it
  RI needs extents of structured data UNDER the temporal collection

Change-Id: Iafe83dd99a6d55d8d4c3c671e015ff81b4ba4a55
Declare the dependency on boost headers

Change-Id: I36d17a186f513f747c32470dd2116cb4d819405b