diff --git a/.gitignore b/.gitignore
index 4e902e5..1852549 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,4 @@
 *.pyc
-*sln
-breakpoints*
-update.bat
-doit.sh
-
+*.sln
+breakpoints.xml
+icons/Thumbs.db
diff --git a/tools/pre_commit_bom_check b/tools/pre_commit_bom_check
new file mode 100644
index 0000000..49e5080
--- /dev/null
+++ b/tools/pre_commit_bom_check
@@ -0,0 +1,11 @@
+#! /bin/sh
+# move to .git/hooks/pre-commit
+
+git diff --cached --no-renames --diff-filter=AM --name-only -- '*.py' |
+(status=0; while read path; do
+    if git show ":$path" | head -1 | grep $'^\xEF\xBB\xBF' >/dev/null; then
+        echo "Error: file '$path' starts with Unicode BOM. Run 'remove_bom.sh $path" then try commit again."
+        status=1
+    fi
+done
+exit $status)
\ No newline at end of file
diff --git a/tools/remove_bom.sh b/tools/remove_bom.sh
new file mode 100644
index 0000000..e5c7ff7
--- /dev/null
+++ b/tools/remove_bom.sh
@@ -0,0 +1 @@
+sed -b -i -e "1s/^\xEF\xBB\xBF//" $1
\ No newline at end of file
diff --git a/tools/update.bat b/tools/update.bat
new file mode 100644
index 0000000..612fe27
--- /dev/null
+++ b/tools/update.bat
@@ -0,0 +1,2 @@
+robocopy "%userprofile%/repos/web inspector" "%appdata%/sublime text 3/packages/web inspector" /s /xd .git* /xf .git* /xf *st3* /mir
+attrib +r "%appdata%/sublime text 3/packages/web inspector/*py"
\ No newline at end of file