Core: Fix a possible overflow in EXI_DeviceIPL

m_szBuffer has a size of 256, but addressable range is 0 - 255
Core: Use character literals within EXI_DeviceIPL
Core: Remove defines used to work around an MSVC 2005 bug
Merge pull request #694 from lioncash/interp-defines

Core: Remove defines used to work around an MSVC 2005 bug
Merge pull request #678 from lioncash/overflow

Fix a possible overflow in EXI_DeviceIPL.
Convert some more header inclusions into forward declarations
Android: Remove an unused variable from MainAndroid.cpp
Merge pull request #697 from lioncash/unused-android

Android: Remove an unused variable from MainAndroid.cpp
Really get rid of the MSVC 2005 workaround completely
Merge pull request #698 from lioncash/missed-workaround

Really get rid of the MSVC 2005 workaround completely
Core: Use an enum for the Gekko exception flags instead of defines
Merge pull request #696 from lioncash/more-forward-decls

Convert some more header inclusions into forward declarations
Merge pull request #699 from lioncash/enum

Core: Use an enum for the Gekko exception flags instead of defines
Add TryParseVector to StringUtil.
Adds a nice way to have options be in a vector for results
Add a config location for VideoCommon configurations.
This file can be used for more than just PP shaders configuration, but for now it is only for PP shaders.
In the future this can be used for more.
Add the VideoCommon PostProcessing class.

This class loads all the common PP shader configuration options and passes those options through to a inherited class that OpenGL or D3D will have.
Makes it so all the common code for PP shaders is in VideoCommon instead of duplicating the code across each backend.
Add the PostProcessing class object to RenderBase in VideoCommon.
Backends will initialize this variable with their own inherited PostProcessing class object.
Change OpenGL's post processing to use the new VideoCommon PP object.

Let's OpenGL's PostProcessing namespace be changed to a class inheriting from VideoCommon's PostProcessing class.
Change all the post processing shaders to the new system.
Removes the README.txt file in favour of a new wiki page I'm going to generate.
Add the configuration dialog for post processing configuration options.
Only enables the config button when the shader options available to it