v0.2.1

• Fix and refine docs
• Rename structures to structs
• Add Appveyor CI

v0.2.0

• Refactor ELF structures
• Add support of relocations
• Add ELFFile#machine, ELFFile#elf_type, ELFFile#offset_from_vma, ELFFile#sections_by_type
• Return enumerator instead of array in each_* functions
• Support get name of dynamic tags

v0.1.0

fix duplication and bump 0.1.0