remove unnecessary Zone.Identifier files and obsolete images from media directory

Thesis_Docs/media/FTT Analysis.png:Zone.Identifier

Thesis_Docs/media/algorithm final output.png

Thesis_Docs/media/algorithm final output.png:Zone.Identifier

Thesis_Docs/media/algorithm.jpg:Zone.Identifier

Thesis_Docs/media/apt_attack_lifecycle.png:Zone.Identifier

Thesis_Docs/media/auto-realdata.png:Zone.Identifier

Thesis_Docs/media/auto.png:Zone.Identifier

Thesis_Docs/media/autocorrelation.png:Zone.Identifier

Thesis_Docs/media/avg_day_night.png:Zone.Identifier

Thesis_Docs/media/datasetchart.png:Zone.Identifier

...Docs/media/enterprise_network_diagram.png:Zone.Identifier

Thesis_Docs/media/fourier-realdata.png:Zone.Identifier

Thesis_Docs/media/jsondata.png:Zone.Identifier

Thesis_Docs/media/mal2.png

Thesis_Docs/media/mal2.png:Zone.Identifier

Thesis_Docs/media/mal2s.png

Thesis_Docs/media/mal2s.png:Zone.Identifier

Thesis_Docs/media/maps.png:Zone.Identifier

Thesis_Docs/media/methodchart.png

Thesis_Docs/media/methodchart.png:Zone.Identifier