Update .gitignore

.gitignore

@@ -24,3 +24,51 @@ fp-info-cache
 # Exported BOM files
 *.xml
 *.csv
+
+# Ignore list for Eagle, a PCB layout tool
+
+# Backup files
+*.s#?
+*.b#?
+*.l#?
+*.b$?
+*.s$?
+*.l$?
+
+# Eagle project file
+# It contains a serial number and references to the file structure
+# on your computer.
+# comment the following line if you want to have your project file included.
+eagle.epf
+
+# Autorouter files
+*.pro
+*.job
+
+# CAM files
+*.$$$
+*.cmp
+*.ly2
+*.l15
+*.sol
+*.plc
+*.stc
+*.sts
+*.crc
+*.crs
+
+*.dri
+*.gpi
+*.pls
+*.ger
+*.xln
+
+*.drd
+*.drd.*
+
+*.s#*
+*.b#*
+
+*.info
+
+*.eps