Implement CreateFile SharedAccess

[Liryna]

Dokan should have a option to make the driver check the file sharedaccess request before forwarding the request to the library.
This will give the ability for the user to not implement his own checks.

See #32
Begining of implementation marinkobabic/dokanx@888bd0d

[Corillian]

Implementing this correctly under all circumstances in my own driver has proved quite frustrating as the documentation is not always clear under which conditions a set of flags should be checked:

https://msdn.microsoft.com/en-us/library/windows/desktop/aa363874(v=vs.85).aspx
https://msdn.microsoft.com/en-us/library/windows/hardware/aa364399(v=vs.85).aspx
https://msdn.microsoft.com/en-us/library/windows/hardware/ff540466(v=vs.85).aspx

I suspect the best way to approach this will be to lookup how it's handled in Microsoft's driver examples such as FastFAT: https://github.com/Microsoft/Windows-driver-samples/tree/master/filesys/fastfat

[Maxhy]

In addition to @marinkobabic tests, latest oplock changes first attempted to also implement shared access. The code is currently partially implemented and commented, see https://github.com/dokan-dev/dokany/blob/master/sys/create.c#L829

[Liryna]

DokanCheckShareAccess has been fixed and enabled. It seems to work with issues but more testing should be done to be sure that all cases are handled.

[Liryna]

IFSTest ShareAccessTest pass 👍 all seems to be good !