Quick start / Building Readme

[hubyhuby]

If you follow the current readme, you will have to install pachage that are complex to install and requires C.
Which is not what most people will want to jump start with explorer.
It brings simmilar issues as : #8
Better starting with a simple "go build "

Where as the current readme advise :
Building
go build -tags full
Will give you this :
"

github.com/blevesearch/blevex/icu

../blevex/icu/boundary.go:15:11: fatal error: unicode/utypes.h: No such file or directory
// #include "unicode/utypes.h"
^~~~~~~~~~~~~~~~~~
compilation terminated.

github.com/jmhodges/levigo

../../jmhodges/levigo/batch.go:4:11: fatal error: leveldb/c.h: No such file or directory
// #include "leveldb/c.h"
^~~~~~~~~~~~~
compilation terminated.

github.com/tecbot/gorocksdb

../../tecbot/gorocksdb/array.go:4:11: fatal error: rocksdb/c.h: No such file or directory
// #include "rocksdb/c.h"
^~~~~~~~~~~~~
compilation terminated.
"
Apart from this the bleve-explorer example works like a charm ;)