Upgrade to Java 8

[dsmiley]

Each commit here addresses a specific matter... with maybe a slight deviation once or twice. Don't view all files at once; go commit-by-commit. Admittedly not all this is "necessary", but it's in line with the language upgrade -- take advantage of the language. Justin, you may want to review the "Geom" in particular.

[codecov-io]

Codecov Report

Merging #197 (5d74f96) into master (052cd12) will decrease coverage by 0.03%.
The diff coverage is 76.47%.

@@             Coverage Diff              @@
##             master     #197      +/-   ##
============================================
- Coverage     75.95%   75.92%   -0.04%     
- Complexity     1111     1112       +1     
============================================
  Files            57       59       +2     
  Lines          3826     3825       -1     
  Branches        775      775              
============================================
- Hits           2906     2904       -2     
- Misses          642      644       +2     
+ Partials        278      277       -1     

Impacted Files	Coverage Δ	Complexity Δ
...locationtech/spatial4j/context/SpatialContext.java	76.56% <ø> (ø)	28.00 <0.00> (ø)
...locationtech/spatial4j/distance/DistanceUtils.java	69.75% <ø> (ø)	50.00 <0.00> (ø)
.../java/org/locationtech/spatial4j/io/WKTReader.java	87.70% <ø> (ø)	52.00 <0.00> (ø)
...tech/spatial4j/io/jts/JtsWKTReaderShapeParser.java	75.75% <ø> (ø)	7.00 <0.00> (ø)
...n/java/org/locationtech/spatial4j/shape/Point.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
.../locationtech/spatial4j/shape/ShapeCollection.java	48.78% <0.00%> (ø)	22.00 <0.00> (ø)
...ocationtech/spatial4j/shape/impl/BufferedLine.java	77.55% <ø> (ø)	29.00 <0.00> (ø)
...iontech/spatial4j/shape/impl/ShapeFactoryImpl.java	81.81% <ø> (+0.49%)	39.00 <0.00> (ø)
...ationtech/spatial4j/shape/jts/JtsShapeFactory.java	93.06% <ø> (+0.45%)	58.00 <0.00> (ø)
...org/locationtech/spatial4j/shape/ShapeFactory.java	50.00% <50.00%> (ø)	1.00 <1.00> (?)
... and 10 more

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[jdeolive]

Everything looks good to me David, nice work!