More factory methods

[tzaeschke]

Added missing factory methods for kd-tree(IndexConfig) and STR-lo;aded R-Trees.

[codecov[bot]]

Codecov Report

Merging #30 (31a3f5d) into master (53267e0) will decrease coverage by 0.13%. The diff coverage is 68.25%.

@@             Coverage Diff              @@
##             master      #30      +/-   ##
============================================
- Coverage     73.74%   73.62%   -0.13%     
- Complexity     2044     2046       +2     
============================================
  Files            76       76              
  Lines          8041     8057      +16     
  Branches       1575     1575              
============================================
+ Hits           5930     5932       +2     
- Misses         1723     1737      +14     
  Partials        388      388              

Files Changed	Coverage Δ
src/main/java/org/tinspin/index/BoxMap.java	41.66% <0.00%> (-13.89%)	:arrow_down:
src/main/java/org/tinspin/index/BoxMultimap.java	36.36% <0.00%> (-13.64%)	:arrow_down:
src/main/java/org/tinspin/index/PointMap.java	47.05% <0.00%> (-14.48%)	:arrow_down:
src/main/java/org/tinspin/index/PointMultimap.java	41.17% <0.00%> (-12.67%)	:arrow_down:
...java/org/tinspin/index/rtree/RTreeMixedQuery2.java	0.00% <0.00%> (ø)
...ain/java/org/tinspin/index/rtree/RTreeNodeDir.java	93.75% <ø> (ø)
...in/java/org/tinspin/index/rtree/RTreeNodeLeaf.java	100.00% <ø> (ø)
...c/main/java/org/tinspin/index/rtree/STRLoader.java	55.35% <0.00%> (ø)
...n/java/org/tinspin/index/util/PointMapWrapper.java	90.69% <ø> (ø)
...a/org/tinspin/index/util/PointMultimapWrapper.java	86.95% <ø> (ø)
... and 8 more