Update git hooks

Add check to pre-commit hook to skip on Windows, where it is currently
partially broken
Notify user when hooks are run to replace similar shared-git-hooks
functionality

hooks/post-checkout

@@ -2,6 +2,8 @@
 
 # stolen from https://gist.github.com/sindresorhus/7996717
 
+echo "Running post-checkout hook..."
+
 changed_files="$(git diff-tree -r --name-only --no-commit-id $1 $2)"
 
 

hooks/post-merge

@@ -2,6 +2,8 @@
 
 # stolen from https://gist.github.com/sindresorhus/7996717
 
+echo "Running post-merge hook..."
+
 changed_files="$(git diff-tree -r --name-only --no-commit-id ORIG_HEAD HEAD)"
 
 

hooks/pre-commit

@@ -1,5 +1,14 @@
 #!/usr/bin/env bash
 
+case $(uname) in
+    *CYGWIN*|*MINGW*|*MSYS*)
+        echo "Cygwin/MinGW/MSYS detected, skipping pre-commit hook"
+        exit 0
+        ;;
+esac
+
+echo "Running pre-commit hook..."
+
 source ./scripts/common.sh
 
 jsfiles=$(cachedTSLintFiles)