Added iterator support for FileList

[siad007]

No description provided.

[codecov]

Codecov Report

Merging #1105 into master will decrease coverage by <.01%.
The diff coverage is 0%.

@@             Coverage Diff              @@
##             master    #1105      +/-   ##
============================================
- Coverage     46.88%   46.87%   -0.01%     
- Complexity    10028    10030       +2     
============================================
  Files           505      505              
  Lines         24557    24561       +4     
============================================
  Hits          11513    11513              
- Misses        13044    13048       +4

Impacted Files	Coverage Δ	Complexity Δ
classes/phing/types/FileList.php	35.52% <0%> (-1.98%)	33 <2> (+2)

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