ignore SQL server database files
Merge pull request #948 from bbodenmiller/patch-1

ignore SQL server database files
Ignore the build result of ATL Project.

This commit Makes VisualStudio.gitignore ignore the three items below. It needs when you create an ATL Project.

* [Dd]ebugPS/
* [Rr]eleasePS/
* dlldata.c
Merge pull request #923 from simnalamburt/patch-1

Updated rules of 'VisualStudio.gitignore' about ATL Project.