File README.packaging of Package influxdb

The source tarball is obtained as the following:

1. Install govendor (skip, if already installed)

# go get github.com/kardianos/govendor

2. Obtain influxdb source codes

# mkdir ~/go/src/github.com/influxdata
# cd ~/go/src/github.com/influxdata
# git clone --branch v1.2.4 https://github.com/influxdata/influxdb.git influxdb-1.2.4

3. Obtain vendor dependencies

# cd influxdb-1.2.4
# govendor migrate
# govendor sync

4. Create archive

# cd ..
# tar -jcf influxdb-1.2.4.tar.bz2 --exclude-vcs influxdb-1.2.4