Sign builds with our keys

Change-Id: If5d2482e15b0930afe53f33aa84c6075da0ee8d8
Copy signed files

Change-Id: I1c04f1e5fcdd3eff12d121ccc9be02db2366d32a
Remove -signed suffix to match with MODVERSION

Otherwise CMUpdate shows "Downloaded" instead of "Installed".
Create device directory
Add support for incremental updates

Change-Id: I77bc14d251eb3deccdde24e1dcb3bc1b653bd65a
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Copy signed intermediate
Move releases to stable folder
androidarmv6/build_env
Copy md5sum files
Fix ssh proto
Update API url to generate changelog properly
Copy changelog as cm-.txt
Create incremental update between stable releases

Change-Id: I21d1fc06a030c2525cc77fd44527bdc044f4afbc
Allow incremental updates between nightly/stable releases

If an user follows the stable channel, allow downloading patches between stable releases.
No more jump between different channels

Change-Id: I1c50ab6ca3dd373425912800f223761d2dbc9dc6
Remove older nightlies and deltas

Change-Id: Ib5181a7f062e95c22ee2781ebd5162a74c8ffdd0
Use device specific ccache dir

This will reduce compile time because of less files in cache.

Change-Id: Ibccd3f05fb24f8bf45d4b0cf2d9810913bda5e9c
Don't delete incremental updates in stable folder

Change-Id: I3d1961d86fc6fb22f927b4e8ad97065ab2e8b619
Copy the latest recovery image to http://download.androidarmv6.org/ if EXPORT_RECOVERY defined.

Change-Id: I5ccaa17e9a60315676743fcf4d984af3a2399667
Implement ota_separate_recovery for ota

Change-Id: I274b2974d93c69d33d5568bef007b5a2e4b55b29