Rank sampling dens is now a template parameter

since we can not set the value of the
constructor parameter, when rrr_vector is
used in more complex classes. Now
You Get What You Declare :)
Fixed compile warning: signed/unsigned comparison.
Conversion to microseconds.
Added template argument.
Added checksum to prevent that the calls are

optimized away.
Removed unnecessary private keyword.
Removed unused parameter.
Removed unused parameter.
Merge pull request #83 from simongog/YGWYD_rrr_vector

Address issue #82 for rrr_vector
first version of the new simplified memory management
more updates to the new memory management system
fixes to the new memory management system
first working hugepage allocator version
allow extending of the last block in a cheap way
More improvements to the new memory manager

the memory manager now compiles with g++4.7. The hugepages example
now shows how the memory monitor is used.
set file size even if we don't resize