Apollo PC Tools v2.1.0

What's Changed

• add GUI patcher app by @bucanero in #65
• add test suite by @bucanero in #66
• Set save-patching endianness at runtime by @bucanero with @Copilot in #64
• improve code Validation by @bucanero in #67
• Memory allocation checks by @bucanero in #68

Full Changelog: v2.0.4...v2.1.0