ARROW-5173: [Go] handle multiple concatenated record batches

[sbinet]

No description provided.

[sbinet]

needs #4159

[codecov-io]

Codecov Report

Merging #4160 into master will decrease coverage by 26.77%.
The diff coverage is 22.68%.

@@ Coverage Diff @@## master #4160 +/- ##
===========================================
- Coverage 87.89% 61.11% -26.78% 
===========================================
Files 758 67 -691 Lines 92163 4943 -87220 Branches 1251 0 -1251 ===========================================
- Hits 81006 3021 -77985 + Misses 11040 1810 -9230 + Partials 117 112 -5

Impacted Files	Coverage Δ
go/arrow/array/list.go	74.56% <0%> (-12.18%)	⬇️
go/arrow/ipc/file_reader.go	0% <0%> (ø)	⬆️
go/arrow/ipc/metadata.go	0% <0%> (ø)	⬆️
go/arrow/array/struct.go	84.31% <100%> (+11.67%)	⬆️
go/arrow/array/fixedsize_binary.go	73.8% <79.16%> (+5.38%)	⬆️
python/pyarrow/ipc.pxi
cpp/src/arrow/csv/chunker-test.cc
cpp/src/parquet/column_page.h
cpp/src/parquet/bloom_filter-test.cc
cpp/src/arrow/array/builder_decimal.cc
... and 688 more

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[sbinet]

PTAL @stuartcarnie@alexandreyc@nickpoorman

[sbinet]

(the Travis-CI error is unrelated (JDK-9 is acting up?))

[alexandreyc]

Looks like this PR is a subset of #4161

[stuartcarnie]

For building complex CLI interfaces, I'd recommend you look at https://github.com/spf13/cobra. You can then have a single binary:

$ arrow ls ...

$ arrow cat

etc