update scripts and docs to use human-readable sector size

Commit #fa863595 modified various CLI commands to accept a 
human-readable sector size. We should update docs and scripts, too.

scripts/dev/gen-daemon

@@ -4,7 +4,7 @@ set -o xtrace
 
 export TRUST_PARAMS=1
 
-go run -tags=debug ./cmd/lotus-seed pre-seal --sector-size 2048 --num-sectors 2
+go run -tags=debug ./cmd/lotus-seed pre-seal --sector-size 2KiB --num-sectors 2
 go run -tags=debug ./cmd/lotus-seed genesis new localnet.json
 go run -tags=debug ./cmd/lotus-seed genesis add-miner localnet.json ~/.genesis-sectors/pre-seal-t01000.json
 go run -tags=debug ./cmd/lotus daemon --lotus-make-genesis=devel.gen --genesis-template=localnet.json --bootstrap=false

scripts/devnet.bash

@@ -12,11 +12,11 @@ faucet="http://t01000.miner.interopnet.kittyhawk.wtf"
 
 PLEDGE_COUNT="${1:-20}"
 
-if [ -z "$BRANCH" ]; then 
+if [ -z "$BRANCH" ]; then
   BRANCH="interopnet"
 fi
 
-if [ -z "$BUILD" ]; then 
+if [ -z "$BUILD" ]; then
   BUILD="no"
 fi
 
@@ -65,7 +65,7 @@ cat > "${BASEDIR}/scripts/create_miner.bash" <<EOF
 set -x
 
 lotus wallet import ~/.genesis-sectors/pre-seal-t01000.key
-lotus-storage-miner init --genesis-miner --actor=t01000 --sector-size=2048 --pre-sealed-sectors=~/.genesis-sectors --pre-sealed-metadata=~/.genesis-sectors/pre-seal-t01000.json --nosync
+lotus-storage-miner init --genesis-miner --actor=t01000 --sector-size=2KiB --pre-sealed-sectors=~/.genesis-sectors --pre-sealed-metadata=~/.genesis-sectors/pre-seal-t01000.json --nosync
 EOF
 
 cat > "${BASEDIR}/scripts/pledge_sectors.bash" <<EOF

scripts/init-network.sh

@@ -3,7 +3,7 @@
 set -xeo
 
 NUM_SECTORS=2
-SECTOR_SIZE=2048
+SECTOR_SIZE=2KiB
 
 
 sdt0111=$(mktemp -d)