Fix GeoTrellisPath parsing

[CloudNiner]

Overview

Parsing of url authority was bad. This should fix that. This PR also opened a discussion around whether absolute and relative urls without scheme should be valid as well so there's tests for those here that currently fail. If we want to support this, I can add a fix for that here as well, where scheme-less urls assume file://.

Before fix, 7 of new tests fail. After, only the scheme-less tests fail.

Checklist

• docs/CHANGELOG.rst updated, if necessary
• Module Hierarcy updated, if necessary
• docs guides update, if necessary
• New user API has useful Scaladoc strings
• Unit tests added for bug-fix or new feature

[pomadchin]

LGTM; @CloudNiner you can also try to make schemelss URIs work and if none of the other tests would fail lets merge it 💯

[CloudNiner]

With fix applied:

scala> val rasterSource = RasterSource("s3://azavea-datahub/catalog?layer=nlcd-2011-epsg3857&zoom=13&band_count=1")
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
log4j:WARN No appenders could be found for logger (org.apache.http.client.protocol.RequestAddCookies).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
rasterSource: geotrellis.raster.RasterSource = GeoTrellisRasterSource(s3://azavea-datahub/catalog, Layer(name = "nlcd-2011-epsg3857", zoom = 13))
scala> rasterSource.extent
res3: geotrellis.vector.Extent = Extent(-1.4497467188222097E7, 2480629.988195896, -7087967.414370252, 6960317.577134008)

🎉

[pomadchin]

LGTM 👍 merging once travis is happy!