Photo of Pulp by NCinDC Ronald Henderson, owner of 14th Street stationery and gift store Pulp, died Feb. 15 at his home in Provincetown, Mass., of complications related to AIDS and liver cancer. He was 56. Henderson had lived with AIDS for 25 years, and it informed his work as an activist and educator in his native California, as well as in Washington, D.C., where he was involved with the NAMES Project AIDS Memorial…