update readme

Proofreading

Former-commit-id: 8c8d8be28a25148dc826d7d31ec4678a16b51d61

v0.3-alpha

Former-commit-id: c68cb1447ba14d81c6095f6ef30ac0bf4e5a1cf6

merge

Former-commit-id: aa5daf02f72810cea75a5a9b8f4c8b5a596defa9

new release

Former-commit-id: e26c5ac74b5f6b230ceee97bdb6d0ec56c2059d4

please be careful, @liber145

Former-commit-id: c3ec93c

not worth printing this version

Former-commit-id: dd9e04b