Add .hgignore

.hgignore

@@ -0,0 +1,29 @@
+## To see if new rules exclude any existing files, run
+##
+##   hg status -i
+##
+## after modifying this file.
+
+syntax: glob
+
+## Generated by the build process
+*.xpi
+*/locale/*/*.html
+*/chrome
+*/contrib/vim/*.vba
+
+## Editor backup and swap files
+*~
+.#*
+\#**\#
+.*.sw[op]
+.sw[op]
+
+## Generated by Mac filesystem
+.DS_Store
+
+syntax: regexp
+
+## For rejects
+\.(orig|rej)$
+