moving lib
renaming lib to support
moving boot and init to support
moving amber.js, renaming to amber4browser.js
moving parser* out of js into support
showdown in its own directory in support

It was only one not in core amber platform support
that was not in dedicated subdir.
tweaking amberc to work with boot, init & parser in support/
Merge pull request #542 from herby/folder-structure

Folder structure