messing with volume super-sampling
changes for boost 1.53 and cuda 5.0.32
fix for cuda 5.5 bin directory structure
removed inactive code
added texture view functionality for OpenGL 4.3 scm_gl_core. added example use to ex_texture_objects.
* added OpenGL entry points:
  - OpenGL 4.4 core profile
  - ARB_bindless_texture
  - ARB_sparse_texture
  - ARB_compute_variable_group_size
* started OpenGL 4.4 texture clear functionality
* use of multi-bind texture, sampler and image functions internally
* more to come
fixed regression for OpenGL 4.3 support.

- 430 profile now again default
added ARB_bindless_texture support
- the old render_context->make_resident/make_non_resident calls are _deprecated_ and will be removed in a future update. please port to the new API
- new API offers more flexibility of generating multiple resident handles of single resource with different sampler states applied
- adapted ex_texture_objects example accordingly
ex_volume_ray_cast_cuda changes in qt GUI to support improved GUI rendering when applying FXAA
added missing files from last commit.
BREAKING CHANGE!
- reworked sampler uniform handling in program object
- prior: use of program::uniform_1i to set texture unit (or uniform convenience template)
- now: use program::uniform_sampler to set texture unit or program::uniform_sampler_handle to set resident handle
- uniform_image changed accordingly
- adapted examples and utilities to the change
- run in debug mode to find faulty program::uniform calls
added float32 and float64 typedefs to numeric_types.h
added static assertions for basic numeric types
fix for OpenGL 4.4 multi-bind usage
fix for CUDA release/debug argument to custom command. used CMake generator expressions to resolve this without manual build option.
Revert "fix for CUDA release/debug argument to custom command. used CMake generator expressions to resolve this without manual build option."

This reverts commit c3ef5f76509245fb3038e477bc2259cc641b37e6.

This will be reactivated one CMAKE sorts its shit out :/.
added OpenGL 4.0+ capability of ARB_sample_shading.
- available through rasterizer_state
- added example ex_sample_shading
sample shading experiment on ex_volume_ray_cast
added support for shader storage buffers
fix for CUDA release/debug argument to custom command. used CMake generator expressions to resolve this without manual build option.

- workaround CMake issues for now