Patch: pluralize removeFile/removeFolder API

[Olivier JG]

  Attached are new patches for kdevelop and kdevplatform. Egregious 
errors can be attributed to time of night.
Now, deleting a folder will have any subfiles removed from targets as 
needed, and the api is removeFilesAndFolders.
Known issue is that the remove option shouldn't be present when removing 
target subfiles or the project dir (gasp), this is currently worked 
around for safety and cleanliness. Once this goes in, I'll take a look 
at fixing the context menu.
-Olivier JG

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