v0.15

Changes:

• Partial support for Intel HEX files (view only) (#10)
• Search with unknown half of byte (e.g. '?1') (#2)
• DataStruct: support for unions (#30)
• File comparison: simple one-to-one compare mode for files without insertions
• File compare: clickable list of differences (#45)
• Show Insert/Overwrite mode in status bar (#48)
• Improve handling of unprintable characters in different encodings
• Sponsorship links