#49 [Homescreen] hard to swipe to next page

Fix #49 [Homescreen] hard to swipe to next page

The root cause is homescreen customization not applied to page swipe.

With the patch the build script that can pass swipe options from GAIA_DISTRIBUTION_DIR

For customization, most options are passed from homescreen.js::GridManager.init. So grid.js::default is removed.