Merge pull request #800 from johnkharvey/stella

Add file for Atari 2600 / Atari 7800 assemblers

stella.gitignore

@@ -0,0 +1,12 @@
+# Atari 2600 (Stella) support for multiple assemblers
+# - DASM
+# - CC65
+
+# Assembled binaries and object directories
+obj/
+a.out
+*.bin
+*.a26
+
+# Add in special Atari 7800-based binaries for good measure
+*.a78