Added favicon, changed title to lowercase

[jsvigneshkanna]

Hey 👋, @Priyanshu85

I have

• Added new hammer+spanner favicon which resembles to webtool title
• Updated the website title to lowercase to keep it to web standards
• Please review the code and let me know if any changes needed

Screenshot

Issue: #50

• Please add hacktoberfest-accepted label while closing this PR, so that I can keep track of my contributions this month

Appreciate that!

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[Priyanshu85]

Thanks @jsvigneshkanna