Better parsing errors for version files

[HebaruSan]

Motivation

If a module has a syntax error in its version file, the error in netkan looks like this:

2074 [1] FATAL CKAN.NetKAN.Program (null) - After parsing a value an unexpected character was encountered: ". Path 'KSP_VERSION_MAX', line 37, position 4.

It requires some guessing and/or experience to figure out that this is talking about trying to parse the version file.

Changes

Now we catch that exception and throw a new more descriptive Kraken that explains that it was parsing a version file and gives its path:

2046 [1] FATAL CKAN.NetKAN.Program (null) - Error parsing version file GameData/Severedsolo/OhScrap/OhScrap.version: After parsing a value an unexpected character was encountered: ". Path 'KSP_VERSION_MAX', line 37, position 4.

This should help netkan users to investigate errors, and makes it easier to tell different parsing errors apart.