swarm: plan bee for content storage and distribution on web3

This change imports the Swarm protocol codebase. Compared to the 'swarm'
branch, a few mostly cosmetic changes had to be made:

* The various redundant log message prefixes are gone.
* All files now have LGPLv3 license headers.
* Minor code changes were needed to please go vet and make the tests
  pass on Windows.
* Further changes were required to adapt to the go-ethereum develop
  branch and its new Go APIs.

Some code has not (yet) been brought over:

* swarm/cmd/bzzhash: will reappear as cmd/bzzhash later
* swarm/cmd/bzzup.sh: will be reimplemented in cmd/bzzup
* swarm/cmd/makegenesis: will reappear somehow
* swarm/examples/album: will move to a separate repository
* swarm/examples/filemanager: ditto
* swarm/examples/files: will not be merged
* swarm/test/*: will not be merged
* swarm/services/swear: will reappear as contracts/swear when needed

1 files changed, 46 insertions, 0 deletions

diff --git a/swarm/api/testapi.go b/swarm/api/testapi.go
new file mode 100644
index 000000000..6631196c1
--- /dev/null
+++ b/swarm/api/testapi.go
@@ -0,0 +1,46 @@
+// Copyright 2016 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package api
+
+import (
+	"github.com/ethereum/go-ethereum/swarm/network"
+)
+
+type Control struct {
+	api  *Api
+	hive *network.Hive
+}
+
+func NewControl(api *Api, hive *network.Hive) *Control {
+	return &Control{api, hive}
+}
+
+func (self *Control) BlockNetworkRead(on bool) {
+	self.hive.BlockNetworkRead(on)
+}
+
+func (self *Control) SyncEnabled(on bool) {
+	self.hive.SyncEnabled(on)
+}
+
+func (self *Control) SwapEnabled(on bool) {
+	self.hive.SwapEnabled(on)
+}
+
+func (self *Control) Hive() string {
+	return self.hive.String()
+}