Enabled path remapping for local debugging.

This helps in local debugging when project files are copied to a temporary
location, but need to be debugged from the project folder (for example,
with debugging of cocos2d-x apps in iOS simulator).
Updated filename/source code heuristic in the debugger (Mobdebug 0.5362).

If the "chunkname" has no newline, it's treated as a file name.
This helps with handling cases when the application engine reports
filenames without @ (for example, when they are loaded using
loadstring("chunk", "file") instead of loadstring("chunk", "@file"));
also helps with debugging cocos2dx apps that load Lua files.
Added links to project page and documentation (closes #180).
Updated static analyzer to report only first instance of 'unknown field'.