Fixes a bug where uppercase variants of keywords were not detected

Fixed a bug where paths containing sharename containing $-signs would…

… not be searched

Updated README.md

Added "Date modified" filter

Merge branch 'master' of https://github.com/vivami/SauronEye

Start w/ UnitTests + handle paths > 260 chars

- Refactored to be able to UnitTest better
- Added 2 UnitTests, just for fun 🚑
- Previous release just jumped over paths > 260 chars, this release handles them correctly (requires .NET 4.7.2)
- Fixed a bug where filtering would not happen on files in the root directory

Fixed a bug where SauronEye would crash on PathTooLongException

Now handles paths larger than 260 and skips them (Windows is also not really able to process them reliably).

Implemented regex for search keywords

Added compatibility note