Update travis link for this fork
Further travis link fixups
Merge Vannevar hackathon work

- This cl is mostly concerned with extending ToPOD and ParseArg
methods to support precise serialization/deserialization.  ToPOD
now takes an optional "precise" argument (default true) -- when
this is set to true, FT and RT leaves of serialization tree are
serialized to precise string representations dependent on the
kernel in use.  When the precise argument is false, FT and RT
leaves are serialized to doubles, and precision may be lost.
ParseArg methods now understand either format.

- A wrapper has been added for Aff_transformation_2.

- A wrapper has been added for the global collinear function.

- A coordinate accesser has been added to the Polygon_2 wrapper.

- tavis.yml has been modified so travis will matrix build with both
the epick and epeck kernels for acceptance testing.

- binding.gyp has ben modified to explicitly build with libc++ under
OSX, in order to address some dynamic linkage issues surrounding
use of CGAL stream operators in "pretty" mode.

- A first pass has been made at making commentary and header
formatting more consistent.
Merge pull request #2 from fritzm/hackathon-squash

Hackathon squash
Add default ToString implementation to wrapper template

- Wrappers now automatically get a default ToString implementation
based on the CGAL output stream operators.  Individual wrapper
classes may still override the default with a custom implementation.
Refactor precise construction code

- Added a templated ParseArg<NumberType> method to to template wrapper
base class, in order to factor out replicated logic related to K::FT
and K::RT precise construction.

- General refactor of wrapper ParseArg implementations to use the new
base class method and for general overall consistency.
Merge remote-tracking branch 'fluxio/master'
Merge work from fritzm/node-cgal fork
Merge pull request #11 from fritzm/push-to-fluxio

hackathon work, matrixed kernel builds, misc cleanup