Added benchmark in go/anagram
Added benchmark in go/accumulate
Added benchmark in go/atbash-cipher
Added benchmark in go/allergies
Added benchmark in go/binary
Added benchmark in go/bob
Added benchmark in go/etl
Added benchmark in go/hamming
Added benchmark in go/leap
Added benchmark in go/rna-transcription
Added benchmark in go/roman-numerals
Added benchmark in go/word-count
go/anagram: include all cases in benchmark
go/accumulate: stop timer to avoid measuring external loop overhead
Added benchmark in go/bottles
Added benchmark in go/nucleotide-count
Added benchmark in go/octal
Added benchmark in go/phone-number
Merge pull request #1416 from tompao/benchmarks

Add micro-benchmarks for Go exercises