Update .gitignore so test files aren't annoying

.gitignore

@@ -1,8 +1,86 @@
 ### Custom ###
 *.json
-*.csv
 tests
 
+### Data ###
+*.csv
+*.dat
+*.efx
+*.gbr
+*.key
+*.pps
+*.ppt
+*.pptx
+*.sdf
+*.tax2010
+*.vcf
+*.xml
+
+### Images ###
+# JPEG
+*.jpg
+*.jpeg
+*.jpe
+*.jif
+*.jfif
+*.jfi
+
+# JPEG 2000
+*.jp2
+*.j2k
+*.jpf
+*.jpx
+*.jpm
+*.mj2
+
+# JPEG XR
+*.jxr
+*.hdp
+*.wdp
+
+# Graphics Interchange Format
+*.gif
+
+# RAW
+*.raw
+
+# Web P
+*.webp
+
+# Portable Network Graphics
+*.png
+
+# Animated Portable Network Graphics
+*.apng
+
+# Multiple-image Network Graphics
+*.mng
+
+# Tagged Image File Format
+*.tiff
+*.tif
+
+# Scalable Vector Graphics
+*.svg
+*.svgz
+
+# Portable Document Format
+*.pdf
+
+# X BitMap
+*.xbm
+
+# BMP
+*.bmp
+*.dib
+
+# ICO
+*.ico
+
+# 3D Images
+*.3dm
+*.max
+
 ### Python ###
 # Byte-compiled / optimized / DLL files
 __pycache__/