v0.15.0

This is the first public release incorporating latest NeoFS protocol support and fixing some bugs.

New features:

• upload support (#14, #13, #29)
• ephemeral keys (#26)
• TLS server support (#28)

Behavior changes:

• node weights can now be specified as simple numbers instead of percentages and gateway will calculate the proportion automatically (#27)
• attributes are converted now to X-Attribute-* headers when retrieving object from gate instead of X-* (#29)

Improvements:

• better Makefile (#16, #24, #33, #34)
• updated documentation (#16, #29, #35, #36)
• updated neofs-api-go to v1.25.0 (#17, #20)
• updated fasthttp to v1.23.0+ (#17, #29)
• refactoring, eliminating some dependencies (#20, #29)

Bugs fixed:

• gateway attempted to work with no NeoFS peers configured (#29)
• some invalid headers could be sent for attributes using non-ASCII or non-printable characters (#29)