New functions to deal with pre-computed look up tables.
Motivation is to speed up large computation that use predicate
functions depending on voxel neighborhood, such as isSimple.

Add new folder /topology/tables containing:
 - NeighborhoodConfigurations.h loading table and map.
 - NeighborhoodConfigurationsHelpers.h helpers for Object
 and CubicalComplex.
 - compressed .tar.gz tables for simplicity.

Modify example generateSimplicityTables3D, and 2D:
 - using functions from new header.
 - create tables for different topologies.
 - user can choose 26_6,6_26, 18_6 and 6_18 topologies in 3D and
 8_4,4_8 in 2D.
 - Generated tables are then compressed using:
`cmake -E tar cvzf table26_6.tar.gz simple_table26_6.txt`

Add CMake rules:
 - NeighborhoodTablesConfig.cmake dealing with decompress,
copy and install tables. Linked in root CMakeLists.txt
 - NeighborhoodTablesConfig.h.in . CONFIGURE_FILE with strings pointing
 to all available tables. The generated NeighborhoodTablesConfig.h
 change location of tables depending on Build or Install.

 * Add typedef NeighborhoodConfiguration = uint_32 in
topology/helpers/NeighborhoodConfigurationHelper.h.
 * Remove NeighborhoodConfigurationHelpers.h.
   * Move generateTable to
topology/tables/NeighborhoodConfigurationGenerators.
   * Rename and move getOccupancyXXX functions, to Object class function and
CubicalComplexFunctions respectively.
 * Fix indendation in testObject.
 * Rename and add documentation to helper function mapping zero
neighborhood points to configuration bit masks.