Fix script hashing to use full application startup path and add logging

[PiJoCoder]

To test run SQL Nexus from a folder different than it resides in. For example, go to 'C:\Windows\System32' and call it from there

C:\Windows\System32>c:\GitRepos\SqlNexus\sqlnexus\bin\Release\sqlnexus.exe /S /I

Before this fix, you would get this for example:

SQLNexus Information: 0 : Executing post-script: ReadTracePostProcessing.sql
SQLNexus Error: 0 : Script is not allowed or has been tampered with: 'ReadTracePostProcessing.sql'

After the fix you would see:

SQLNexus Information: 0 : Executing post-mortem analysis scripts for importer 'ReadTrace (SQL XEL/TRC Files)'...
SQLNexus Information: 0 : Executing post-script: ReadTracePostProcessing.sql
SQLNexus Information: 0 : Db name = 'sqlnexus'
SQLNexus Information: 0 : Executing ReadTracePostProcessing.sql ...