added explicit dependency to log and regex.
added explicit dependency to log and regex.

tempbottle/handlebars-rust,ihrwein/handlebars-rust,sunng87/handlebars-rust,tempbottle/handlebars-rust,tailhook/handlebars-rust,wang19742008/handlebars-rust,sunng87/handlebars-rust,tailhook/handlebars-rust