Add dub package file

It compiling well.

I disable:

* demos
* windows' specific staff
* sdl2 (error in compiling, may be because of new version)
  
    I try to add `derelict-sdl2` in dependencies but it have error in `SDL_FreeSurface` in utils/graphics/sdl2image.d

* `sys/vfs_curl.d` - it says:
  ```
  sys/vfs_curl.d(14): Error: Declaration expected, not 'module'
  ```
* `sys/benchmark.d` also have some errors:
```
sys/benchmark.d(48): Error: undefined identifier HANDLE
sys/benchmark.d(48): Error: undefined identifier GetCurrentProcess
sys/benchmark.d(49): Error: undefined identifier HANDLE
sys/benchmark.d(49): Error: undefined identifier GetCurrentThread
sys/benchmark.d(51): Error: undefined identifier HANDLE
sys/benchmark.d(52): Error: undefined identifier OpenProcessToken
sys/benchmark.d(54): Error: undefined identifier LUID
sys/benchmark.d(55): Error: undefined identifier LookupPrivilegeValue
sys/benchmark.d(59): Error: undefined identifier TOKEN_PRIVILEGES
sys/benchmark.d(64): Error: undefined identifier AdjustTokenPrivileges
sys/benchmark.d(65): Error: undefined identifier GetLastError
sys/benchmark.d(65): Error: undefined identifier ERROR_SUCCESS
sys/benchmark.d(67): Error: undefined identifier SetPriorityClass
sys/benchmark.d(69): Error: undefined identifier SetThreadPriority
sys/benchmark.d(71): Error: undefined identifier SetProcessAffinityMask
```

Little strange thing: result package libae.a is about 37MB

I already published: http://code.dlang.org/packages/ae

---
ps. as I learn before, author don't like changes so probably it will never be merged, but can be useful for other people
Is this right? We don't specify the version of ae anywhere (not that it has one).