add an FAQ item about e-matches

diff --git a/FAQs/e-matches.mdwn b/FAQs/e-matches.mdwn
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+# What kind of igniters do you support with your electronics?
+
+Altus Metrum in-flight products are designed to work with "low current
+e-matches".  Most often, the ones available at reasonable prices are made
+for use in the fireworks industry.  Local motor vendors tend to know how to
+get these and other supplies like black powder and are a good place to 
+start.  A number of Chinese makers sell e-matches on eBay at extremely 
+reasonable prices, the best search to find them is "fireworks connecting 
+wire".
+
+High-current initiators like Estes igniters, holiday light bulbs, etc, are
+unlikely to work.