remove SNAPSHOT in version

version 0.7.0

upgrade to v0.3.1

0.3.0

fix bug issue #85 (#86)

* fix bug issue #85

* fix bugs that not exit when -1

* fix read 0 byte from a byte array

* remove unuseful imports and code format

Merge pull request #21 from Beyyes/f_cgf_make_read_code_tidy

Fix a bug caused by DynamicOneColumnData no break statement