Usability improvements

Added the ability to hide individual nodes in the tree view.
Added the ability to right-click nodes in the tree view.
Treating nodes with a single child as a single node to improve readability.

Bug fixes and minor improvement

File dialog now opens directly to Unity's log folder. Thanks Baratock for these changes!
Expanding and collapsing folders is more reliable, no longer leaves collapsed children in pie chart.

Initial release of Unity Size Explorer

Unzip the folder.
Double-click UnitySizeExplorer.exe.
Open your Unity Editor log file.
Start making changes to see how they would impact your game's file size!

Note this is a very early version with bugs. Please report bugs to help it improve.