Added missing includes for linux/cgroups.hpp.

From: Ian Downes <ian.downes@gmail.com>
Review: https://reviews.apache.org/r/16665
Adds Abhishek Parolkar presentation to documentation.
Enabled toggling between relative and absolute timestamps by clicking on them.

Note that your preference for which type you'd like is remembered
between sessions.

Issue: https://issues.apache.org/jira/browse/MESOS-789

Review: http://reviews.apache.org/r/16712

From: Thomas Rampelberg <thomas@saunter.org>
Review: https://reviews.apache.org/r/16712
Showed start/stop time for tasks of completed frameworks.

From: Thomas Rampelberg <thomas@saunter.org>
Review: https://reviews.apache.org/r/16715
Adds Sigmoid Analytics to Powered By page.
Added a configure time check for building a native python egg.

This autoconf check does a rather complex test for covering MESOS-799.

It builds and test-runs a minimal egg that links against a static
library that imports a standard C++ library object. A static library
(built using the standard mesos build settings) is needed in this
puzzle because the egg producing distutils possibly use slightly
different build settings (derived from python-config).

If this check succeeds, we can be rather sure that the mesos-egg
itself will be functional from a build-env point of view.

From: TILL TOENSHOFF <toenshoff@me.com>
Review: https://reviews.apache.org/r/16436
Fixed namespace resolution in slave/paths.hpp.

From: Ian Downes <ian.downes@gmail.com>
Review: https://reviews.apache.org/r/16788
Updated to bootstrap-3.0.3.

From: Thomas Rampelberg <thomas@saunter.org>
Review: https://reviews.apache.org/r/16798
Added missing trailing slash and 'f' in Makefile.am.

Commit 2026b0dd2a337e3873283ba501d7a5eb75aa9cfa updated the Makefile
but missed a trailing slash to append the file list.

The .woff font file was also missing an extra 'f', which prevented
make from finding it

Review: http://reviews.apache.org/r/16828
Merged freeMemory() into memory().

Instead of having separate functions to get total and free system
memory, this patch merge the two in memory().
memory() now returns a struct containing both stats.

Review: https://reviews.apache.org/r/16769
Updated slave to use new memory struct.

From #16769, memory() now returns both total _and_ free system memory.
This patch adjusts for the new return type.

Review: https://reviews.apache.org/r/16771
Implemented a table directive that allows for sorting and pagination.

From: Thomas Rampelberg <thomas@saunter.org>
Review: https://reviews.apache.org/r/16787
Enable different http_parser versions.

Update to enable support for different versions of http_parser then
what is currently bundled in Mesos.

From: Timothy St. Clair <tstclair@redhat.com>
Review: https://reviews.apache.org/r/16764
Upgraded libprocess to protobuf 2.5.0.

Review: https://reviews.apache.org/r/16651
Upgraded stout to protobuf 2.5.0.

Review: https://reviews.apache.org/r/16652
Upgraded Mesos to protobuf 2.5.0.

Review: https://reviews.apache.org/r/16653
Replaced 'std::tr1' with 'lambda' and 'memory' in stout.

The 'lambda' and 'memory' namespace gives us a level-of-indirection
that makes it easier to do either C++03 or C++11 compilation.

Review: https://reviews.apache.org/r/16654
Replaced 'std::tr1' with 'lambda' and 'memory' in libprocess.

Some fixes and enhancements were also made to the C++11 version of the
library. At this point libprocess can be compiled for C++11 and all
tests pass with gcc 4.8.

Review: https://reviews.apache.org/r/16655
Replaced 'std::tr1' with 'lambda' and 'memory' in Mesos.

At this point we can compile Mesos for C++11 with gcc 4.8.

Review: https://reviews.apache.org/r/16656
Upgraded to ZooKeeper 3.4.5.

In order to build Mesos with clang we need to upgrade
ZooKeeper. Unfortunately, Mesos leveraged some internal APIs of
ZooKeeper that changed so this commit required some refactorings.

Review: https://reviews.apache.org/r/16657