Release 0.10.0 changes

Revised configuration architecture
Updated code to better conform to our Logging Guidelines
Added PyCap-based import-export tool
Moved temporary files to dynamically-generated, secure temporary folder
Added tests for REDCap connection and alerts when it fails
Added check for data freshness
Added example configuration content
Improved Python packaging
Cleaned up code to PEP-8 standards
Added configuration file documentation
Added dry-run functionality
Added default configuration values where appropriate
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