Event delivery to/from Python and C++.
Move Python support to https://github.com/alecthomas/entityx_python
Added entityx::make_ptr to mirror std::make_shared
Merge pull request #21 from scott-linder/master

Added entityx::make_ptr to mirror std::make_shared
Added std::forward in order to respect move semantics in some methods.

Previously, calls to the methods assign<C>(...), emit<E>(...), and add<S>(...)
would fail if constructor arguments relied upon move semantics.
Merge pull request #22 from scott-linder/master

Added std::forward in order to respect move semantics in some methods.
Add pkg-config source file
Merge pull request #26 from hovatterz/pkg-config

Add pkg-config source file
Fixed compile issues on Windows with Visual Studio 2013.

- Made compiler flags dependent on the compiler being used.
- Added check for clang to use the same compiler options as gnu g++