feat(people): add memorials for Shapiro, Steinberg, Klijnsma, Dolan

Add memorial entries for Mark Shapiro (#158), Steve Steinberg/Frank
Drake (#160), Yonathan Klijnsma (#161), and James Dolan (#162)

people/jamesdolan.json

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+{
+  "firstname": "James",
+  "lastname": "Dolan",
+  "handle": "",
+  "birth": "1981",
+  "death": "2017",
+  "obituary": "",
+  "issue": "162",
+  "affiliations": "",
+  "mainimage": "/images/face-silhouette-clipart.png",
+  "maintext": "<p>James Dolan was a computer security expert and Marine veteran. He was a co-creator of SecureDrop, the open-source whistleblower submission system, alongside Aaron Swartz and Kevin Poulsen. SecureDrop is used by major news organizations worldwide to securely receive documents from anonymous sources.</p>",
+  "socialmedialinks": [
+    {
+      "sitename": "Wikipedia",
+      "siteurl": "https://en.wikipedia.org/wiki/James_Dolan_(computer_security_expert)"
+    }
+  ],
+  "contributions": [],
+  "gallery": []
+}

people/markshapiro.json

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+{
+  "firstname": "Mark",
+  "lastname": "Shapiro",
+  "handle": "gntlmnguardian",
+  "birth": "1979",
+  "death": "2020",
+  "obituary": "https://www.dignitymemorial.com/obituaries/falls-church-va/mark-shapiro-9170264",
+  "issue": "158",
+  "affiliations": "",
+  "mainimage": "/images/face-silhouette-clipart.png",
+  "maintext": "<p>Mark Edward Shapiro was a cybersecurity professional employed at Jacobs Critical Mission Solutions as a Project Manager of cybersecurity, intelligence, and information operations for the Securities and Exchange Commission in Washington, D.C. Only weeks prior to his death, Mark had completed his first cybersecurity industry convention presentation, giving a featured talk at BSides NoVA on \"Democratizing Intelligence.\" He also trained in Executive Protection and Physical Security, and often assisted in this capacity at media conventions.</p>",
+  "socialmedialinks": [
+    {
+      "sitename": "Twitter",
+      "siteurl": "https://twitter.com/gntlmnguardian"
+    }
+  ],
+  "contributions": [
+    {
+      "title": "BSides NoVA 2020 - Democratized Intelligence: Promises and Pitfalls",
+      "url": "https://www.youtube.com/watch?v=qKWQyk7Xypw&list=PLrwRJhfJmJRjleUT5gEBno3S5csqNIhFo&index=6&t=320s",
+      "description": "A talk on the advancement of privatized intelligence capacity, examining how individuals can stand up a functional intelligence apparatus and the hazards of doing so from analytical and operational perspectives."
+    }
+  ],
+  "gallery": []
+}

people/stevesteinberg.json

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+{
+  "firstname": "Steve",
+  "lastname": "Steinberg",
+  "handle": "Frank Drake",
+  "birth": "1970",
+  "death": "2020",
+  "obituary": "https://boingboing.net/2020/10/09/steve-steinberg-hacker-writer-friend-1970-2020.html",
+  "issue": "160",
+  "affiliations": "",
+  "mainimage": "/images/face-silhouette-clipart.png",
+  "maintext": "<p>Steve Steinberg, also known as Frank Drake, was a hacker and writer. He was the publisher of WORM and Intertek, notable hacker-era publications. He was remembered as \"a true hacker\" by those who knew him.</p>",
+  "socialmedialinks": [],
+  "contributions": [],
+  "gallery": []
+}

people/yonathanklijnsma.json

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+{
+  "firstname": "Yonathan",
+  "lastname": "Klijnsma",
+  "handle": "ydklijnsma",
+  "birth": "",
+  "death": "2021",
+  "obituary": "",
+  "issue": "161",
+  "affiliations": "",
+  "mainimage": "/images/face-silhouette-clipart.png",
+  "maintext": "<p>Yonathan Klijnsma was a security researcher known for his work in threat intelligence and cybersecurity. He passed away due to cancer in January 2021.</p>",
+  "socialmedialinks": [
+    {
+      "sitename": "Twitter",
+      "siteurl": "https://twitter.com/ydklijnsma"
+    }
+  ],
+  "contributions": [],
+  "gallery": []
+}