Added line de-duplication.
Removed Trove4j since license wasnt any good.
Stopped calling stuff fast.
Merge pull request #908 from johanstenberg92/line-de-duplication

Line de duplication
Renamed DeDuplicate to Dissolve, added implicit to the geotrellis.vector package, made return type Seq[Line].
Merge pull request #909 from lossyrob/line-dedupe

Updates to the DeDuplicate (renamed dissolve) operation.
Modified to use Traversable, convert to array for indexed access.
Merge pull request #910 from lossyrob/line-dedupe

Further updates to LineDissolve.
Optimization to fetching vertex and vertex count from geometries.
Merge pull request #911 from lossyrob/line-dedupe

Optimization to fetching vertex and vertex count from geometries.
Remove isValid check (it's too slow). Additional optimizations.
Added paren
More optimizations.
Merge pull request #913 from lossyrob/line-dedupe

Further optimizations to Dissolve.
Rewrote LineDissolve, faster and more correct.
Merge pull request #914 from lossyrob/line-dedupe

Rewrote LineDissolve, faster and more correct.
Add cascaded polygon union method to (multi)polygon seq