Wordsmith liferay-mobile-sdk readme.
Reorganize the README's sections.
Fixed my formatting of the git clone snippet.
Edit readme file's intro and instructions based clarifying different points.
Minor wordsmith and fix typos.
Adding download links
These instructions are for building portlet services, not portal services
The SDK Builder deserves its own documentation page
Organizing SDK Builder documentation sections
Fixing section link
Fixing Android and iOS documentation links
Minor change