Add support for ipa path as project path.

- If build-project? is false then it will consider project-path as ipa
  path (Project is already built).
- Move params to opts map

Change-Id: Ifec570f17bcb3b3462090332beb82e36617e6ac1
Update README and docs

Change-Id: I160efad140b4868167d5748f5e2e55d0f217b045