Allow configurable maxdepth in repo_index

[xpuu]

It would be nice to have maxdepth configurable in .git.scmbrc

scm_breeze/lib/git/repo_index.sh

Lines 125 to 129 in b53d1ed

	# Recursively searches for git repos in $GIT_REPO_DIR
	function _find_git_repos() {
	# Find all unarchived projects
	local IFS=$'\n'
	for repo in $(find -L "$GIT_REPO_DIR" -maxdepth 3 -name ".git" -type d \! -wholename '*/archive/*'); do

p.s. Thanks for the awesome toolset. It's a pleasure to follow your workflow.