Merge dist's v1 and v2 branches

[aaaaalbert]

The v1 and v2 branches of dist need to be merged. We only need one set of build scripts, platform-specific install/uninstall scripts, etc., and things like SeattleOnAndroid move to their own repo.

Chintan @choksi81 is taking a look at the differences between the two, and will suggest a way forward.

[aaaaalbert]

I had to take a look myself due to #127, so here's the commented output of git diff --name-status v1..v2, sorted for relevance, and commented from the perspective of the v2 branch.

git status	file name	comments
M	tuf_migration/migrating_softwareupdater.py	Is this actively used???
M	rebuild_base_installers_for_seattlegeni.sh	Modularized version
D	rebuild_repyV2_base_installers_for_seattlegeni.sh	Only in v1; update to match v2's rebuild_base_installers_...
M	seattleinstaller.py	Modified to support Raspberry Pi's, see 24cf396, and #129.
M	build_demokit.py	Doesn't include any apps (there are none!)
M	demokit_files.fi	Modified according to SeattleTestbed/attic#1351
M	executable_setup.py	Amended for SeattleTestbed/attic#1351
M	final_files.fi	Modified according to SeattleTestbed/attic#1351
M	initial_files.fi	Modified according to SeattleTestbed/attic#1351
M	seattleuninstaller.py	v2 moved stop_all_seattle_processes() to a library.
A	updater_keys/manifest.txt	Remove
A	updater_keys/updater.privatekey	Remove
A	updater_keys/updater.publickey	Remove

[aaaaalbert]

Superseded by SeattleTestbed/installer-packaging. Closing!