Don’t run `git submodule update` when building

Revert commit 58c60cf
We need our submodules to be stable.
Move to a specific version of MASPreferences

To build a 32 bits version of MASPreferences
Other 32 bits fixes
Updated README for building with submodules.
Clarify the branch we use
Merge pull request #412 from barijaona/fix-build

Fix building the 32bits version