Various minor updates

• Using default sources in shelephant_send and shelephant_rm.
• Various updates to make the help more readable.
• Adding short options shelephant_remote.

Adding shelephant_parse

• Adding shelephant_parse.

API simplification

• shelephant_get: accepting default source-file

Various minor updates

• shelephant_remote: allow update of existing remote file
• shelephant_get: fixing counter
• shelephant_checksum: accepting default source-file
• Checksum: updating chunk size

First release

• Adding shelephant_extract
• Using Python's unittest
• Renaming internal functions
• Minor updates CI

Beta release

• Renamed shelephant_hash -> shelephant_checksum
• Added shelephant_merge
• Fixing various typos
• Fixing dependencies

Alpha release

v0.1.0

Bumping version