Convert the FAQ from FML to Markdown

src/site/markdown/faq.md

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+---
+title: Frequently Asked Questions
+---
+
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+
+<a id="top"></a>
+
+# Frequently Asked Questions
+
+1. [Why use antrun and not the Ant program itself?](#Why_use_antrun_and_not_the_Ant_program_itself.3F)
+
+### Why use antrun and not the Ant program itself?
+
+Maven has benefits over Ant. You can use Maven as your project management tool. Use its maven-antrun-plugin to
+build your Ant projects.
+
+If you want to migrate from Ant to Maven, use this plugin first. Then convert your Ant expressions into their
+Maven counterparts one by one.