Add mimosa-bower as default module

[dbashford]

• Add as default module
• Add default bower.json for jquery and requirejs
• Remove jquery and requirejs from mimosa new delivered code.
• Alter mimosa new code to point at different location for jquery: vendor/jquery/jquery and requirejs: vendor/requirejs/requirejs
• Update mimosa-bower such that when it doesn't find a bower.json it provides a helpful message to the effect of: "mimosa-bower is a default module. If you do not wish to use it, remove it from the modules array."
• Do not let the lack of a bower.json stop Mimosa from running.