[fact] Convert Spoon3dmMerge to kotlin

[slarse]

#155

[codecov-io]

Codecov Report

Merging #164 (e912cad) into master (76690fd) will decrease coverage by 0.01%.
The diff coverage is 98.02%.

@@             Coverage Diff              @@
##             master     #164      +/-   ##
============================================
- Coverage     81.75%   81.74%   -0.02%     
+ Complexity      434      428       -6     
============================================
  Files            43       43              
  Lines          1776     1764      -12     
  Branches        275      275              
============================================
- Hits           1452     1442      -10     
+ Misses          201      195       -6     
- Partials        123      127       +4     

Impacted Files	Coverage Δ	Complexity Δ
...rc/main/kotlin/se/kth/spork/spoon/Spoon3dmMerge.kt	98.01% <98.01%> (ø)	19.00 <19.00> (?)
src/main/java/se/kth/spork/cli/Cli.java	59.82% <100.00%> (ø)	6.00 <0.00> (ø)
.../spoon/conflict/OptimisticInsertInsertHandler.java	50.00% <0.00%> (-25.00%)	3.00% <0.00%> (-2.00%)
.../spoon/conflict/MethodOrderingConflictHandler.java	37.50% <0.00%> (-6.25%)	5.00% <0.00%> (-1.00%)
...h/spork/spoon/pcsinterpreter/SporkTreeBuilder.java	84.24% <0.00%> (-0.69%)	32.00% <0.00%> (-1.00%)
...in/java/se/kth/spork/exception/MergeException.java
...java/se/kth/spork/exception/ConflictException.java
...in/java/se/kth/spork/exception/SporkException.java
...kotlin/se/kth/spork/exception/ConflictException.kt	100.00% <0.00%> (ø)	1.00% <0.00%> (?%)
...in/kotlin/se/kth/spork/exception/MergeException.kt	100.00% <0.00%> (ø)	1.00% <0.00%> (?%)
... and 2 more

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