Improved performance of tranpose

* Using int instead of dim_type
* Unrolling loops using static consts
* Using output dimensions
Updated README.md with windows build tag
Merge pull request #116 from shehzan10/transpose_perf

Improved performance of tranpose
changed dim_type typedef to int from long long

Using long long for indexing data type is causing drastic
performance drop for CUDA and OpenCL kernels. Hence, changing the
typedef to point to int.
Update README.md

AF Logo Image points to http://arrayfire.com/
Remove cmake whitespace warning
Merge pull request #121 from 9prady9/ocl_perf_fix

changed dim_type typedef to int from long long
Update README.md
Fixed bugs in ScalarNode for CUDA and OpenCL JIT backends
Unary math functions convert arrays to floating point arrays
Merge pull request #123 from pavanky/jit_fixes

Jit fixes for CUDA and OpenCL backends
Fix for copy function in cpu backend

destination array of copy was using wrong strides
indexing unit tests for 3d and 4d arrays
Merge pull request #124 from 9prady9/index_tests

Bug fixes and additional unit tests for af_index

- Bug fixed for indexing in CPU backend
- Tests added for 3D and 4D indexing.
Updated README.md

Added windows test build tag
Increase tolerance for approx tests

* Tests failing because of tolerance on Windows due to floating point errors
* Remove version.h from arrayfire.h
Adding unit tests related info
Merge pull request #130 from arrayfire/devel

Devel - Master merge 20141115