Updating LICENSE.txt to 2011-12-07 CE License

This somehow had reverted to old text. Updating.
Resolved conflicts:
	build/LICENSE_community.txt
Updating incorrect Community to correct Enterprise

Updated to Enterprise (Free, Brief) Edition license, from 2014-04-07.
Resolved conflicts:
	build/LICENSE_enterprise.txt
Comply with EE change for 2014-04-14

This is for packaging, only. Small change in license language.
Fixed race condition: err "the pool is closed" during a rebalance

Commit from go-couchbase:
If Bucket.Do obtains a connection pool at the same time that another
goroutine refreshes the bucket's vbucket map, the bucket can end up with
an already-closed pool which will return errors trying to get a
connection.
Added a utility method Bucket.getConnectionToVBucket that does this
safely by retrying if it got a closed connection pool.
Added SlowServerCallWarningThreshold config variable

Set this to a value in milliseconds; Couchbase bucket requests that
take longer than this will cause a warning to be logged by go-couchbase.
Default value is 200ms.

Resolved conflicts:
	src/github.com/couchbaselabs/sync_gateway/base/bucket.go
Version identification now uses both API level and Gerrit build ID

Version number logged at launch and returned from "GET /" now looks like
"SyncGateway/1.00 (1337; commit 1deadb0f)"
The first version number is the API level which is interpreted by CBL.
The second number is Gerrit's build number.
The third is the Git commit SHA.
Logging defaults to non-color (i.e. without ANSI escape sequences)

To enable color, use -log=color flag
Ensure restTester isn't GC'd before finishing TestConfigServer
CBL-12: Conditionalize calls to syscall.SetRlimit to fix Windows build

Resolves conflicts:
	src/github.com/couchbaselabs/sync_gateway/base/rlimit.go
Fixed the conditional-build comment in rlimit.go

Apparently it needs a blank line after it.