0.3.1

Added:

• Schema for expenses tracking
• builder for Columbia reimbursement forms

Changed:

• open uses explict 'utf-8' bindings (for windows users)
• Allow education to be ongoing
• Allow begin and end years for service
• Make employment optional

Fixed:

• Build presentation PDFs when running in normal operation
• regolith.database.load_git_database checks branch gracefully
• regolith.tools.document_by_value doesn't splay address incorrectly