Added Signs Folder, and added 4 accepted here signs

2 - Letter Sized Dogecoin accepted here sign (Open QR slot and QR that
forwards to dogecoin.com versions)

2 - 5 inch square sized Dogecoin accepted here sign (Open QR slot and QR
that forwards to dogecoin.com versions)
Updated with License

Images:
- DogecoinAcceptedHere_5inch.png
- DogecoinAcceptedHere_5inch_QROpen.png
- DogecoinAcceptedHereLetterSize.png
- DogecoinAcceptedHereLetterSizeQROpen.png

To follow designated License file License-DogecoinAcceptHere.md

To coincide with the need of traders of dogecoin to use these signs as a
means to promote their business and allowance to modify these files to
their needs in promoting commercial trading.
Update License-DogecoinAcceptHere.md

Clarification of files in detail this license pertains to.
Update License-DogecoinAcceptHere.md

Minor changes, eliminated odd character formatting errors.
Merge pull request #7 from sdpenaloza/master

Added Signs Folder, and added 4 accepted here signs with modified LICENSE