model+docs: Small corrections of Doxygen documentation for ndn::Face
model: Small extension of Name class

Now name can be also constructed from a list of strings (previously, there
were a constructor version accepting list of references to strings).
utils: (Re-)enabling printing "dropped" Interests/Data seen by ndn::ForwardingStrategy
model: Changing ForwardingStrategy trace output logic

As of now, ForwardingStrategy will report that packet has been
forwarded (OutData/OutInterest trace) any time packet was send out to the face, regardless
the actual status of a particular send (i.e., will report as send even if queue has
been overflown for a particular face).

Additional trace (DropData/DropInterest) will report all instances of
unsuccessful transmission of Data or Interest, including cases of queue
overflowing on faces, Interest collapsing, Interest limits drops, and other
level-3 "drops".
In simple scenarios, DropData+DropInterest should equal to TxQueue drops.
utils: Extending l2-rate-tracer to include raw packet counts

This is similar to the existing ndn-l3-rate-tracer
model: Refactoring PIT and adding experimental support for a new policy to count container operations
examples: Adding example for the experimental support of PIT aggregate stats
utils: Linux support in mem-usage.h script (reading data from /proc/self/statm)
apps: *BUG* Solving a small bug with ndn::ConsumerZipfMandelbrot, causing excessive memory utilization in some cases (m_N was used before being initialized)
utils: *BUG* Solving a bug with Lfu policy, which effectively made the policy unusable

Update and Lookup events that supposed to update position of CS entry in
the policy container were not implemented correctly.