roo-rb / roo / 540

94%

master: 94%

Pull #462

travis-ci

Restore support of URL for CSV

### Benchmark

```
file_name = 'test/files/Bibelbund.csv'

MemoryProfiler.report{ Roo::Spreadsheet.open(file_name).tap{|x|(2..x.last_row).each{|i| x.row(i)}} }
puts Benchmark.measure{ Roo::Spreadsheet.open(file_name).tap{|x|(2..x.last_row).each{|i| x.row(i)}} }
```

Master
```
Total allocated: 39705265 bytes (561479 objects)
Total retained:  768 bytes (4 objects)

  0.300000   0.000000   0.300000 (  0.304877)
```

Modified:
```
Total allocated: 16952085 bytes (234487 objects)
Total retained:  768 bytes (4 objects)

  0.190000   0.000000   0.190000 (  0.181199)
```

16 of 16 new or added lines in 1 file covered. (100.0%)

1700 of 1807 relevant lines covered (94.08%)

232203.67 hits per line