If HTMLTemplateElement.bootstrap is available, then bootstrap templates in imported documents.
Fixes a problem where imports loaded at the same url would not have the content associated with them.
- 2 minor bugs corrected.
- test added to verify that imports have content associated with them.
lib/test -> tools
check for HTMLTemplateElement existence properly before using.
update tools and loader
add '.git' extension to tools submodule url
remove double slash from path to loader.js
remove extra slash
Merge branch 'master' of https://github.com/toolkitchen/HTMLImports
Merge pull request #6 from toolkitchen/master

4/17 master -> stable