Added header moduoe to documentation

Feature/packaging (CoolProp#26)

* added algorithm include 
* bumped version number
* turned build switches into options
* added a standard interface library target IF97_CMAKE_MODULE
* minor adjustment in documentation

Merge pull request CoolProp#22 from henningjp/compat

Revert emplace_back to the non-C++11 push_back

New Features:

* Thermodynamic functions along the saturation curves
* Mathcad 15 wrapper for stand-alone IF97 usage and verification docs
* Optional compiler switch for more accurate Newtonw-Raphson calcs in Region 3
* Non-state dependent (trivial) property functions for water
* Backward Equations for T(p,h), T(p,s), P(h,s), and T(h,s)
* Transport Property functions (Viscosity, Thermal Conductivity, and Surface Tension)
* Bug fix in Cv formulation in Region 1

Contributors: ibell, henningjp

Basic Thermodynamic Property Set