game entry file names changed to canonical version

games/fall_of_imyrin.md

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+# Fall of Imyrin
+
+_The first serious game using the Annchienta engine._
+
+- Home: http://annchienta.sourceforge.net/?page=fall_of_imiryn
+- State: beta, inactive since 2009
+- Download: https://sourceforge.net/projects/annchienta/files/annchienta/current/
+- Keywords: role playing
+- Code repository: https://github.com/sago007/annchienta.git, https://svn.code.sf.net/p/annchienta/code/ (svn)
+- Code language: C++, Python
+- Code license: GPL-3.0
+- Code dependencies: pygtk, PyQt4
+
+See also entry fo Annchienta.
+
+## Building
+