README: Update for Dizzy release

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
README: Update branches to master for development

This reverts commit 0bf90932c2775a433a752f8b94a7ec51d1891ab9.

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
linux-boundary: Upgrade to 3.10.17_1.0.2 patch release (commit f7a1e187)

Update Linux kernel for Boundary Devices boards to match the Freescale
3.10.17_1.0.2 release and use branch boundary-imx_3.10.17_1.0.2_ga

No functional changes are in this update beyond the bug fixes in
the Freescale release.

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
m28evk: Remove double inclusion of KERNEL_IMAGETYPE

KERNEL_IMAGETYPE = "uImage" is already present a few lines before, so remove
the redundant inclusion.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>