ipfs: Fix for latest IPFS API language

[kallisti5]

• Fixes library to work with latest API version
  from IPFS. The API requests all changed to POST from GET
  (even where POST doesn't make sense)
• Interesting IPFS completely changed the API, but didn't
  bump v0 to v1 :-|
• This breaks compatibility with any old versions
  (0.9.0 or before) but makes the crate work with recent
  versions (0.10.0 - 0.13.0)

[kallisti5]

This one will solve #12

[kallisti5@eris rust-ipfs-api]$ cargo test
warning: field is never read: `version`
  --> src/version.rs:10:5
   |
10 |     version: String,
   |     ^^^^^^^^^^^^^^^
   |
   = note: `#[warn(dead_code)]` on by default

warning: field is never read: `commit`
  --> src/version.rs:11:5
   |
11 |     commit: String,
   |     ^^^^^^^^^^^^^^

warning: field is never read: `repo`
  --> src/version.rs:12:5
   |
12 |     repo: String,
   |     ^^^^^^^^^^^^

warning: field is never read: `system`
  --> src/version.rs:13:5
   |
13 |     system: String,
   |     ^^^^^^^^^^^^^^

warning: field is never read: `golang`
  --> src/version.rs:14:5
   |
14 |     golang: String
   |     ^^^^^^^^^^^^^^

warning: `ipfsapi` (lib) generated 5 warnings
warning: `ipfsapi` (lib test) generated 5 warnings (5 duplicates)
    Finished test [unoptimized + debuginfo] target(s) in 0.03s
     Running unittests (target/debug/deps/ipfsapi-38db13c00250870a)

running 6 tests
test object::tests::test_object_stats ... ok
test block::tests::test_block_put ... ok
test cat::tests::test_cat_bytes ... ok
test cat::tests::test_cat_string ... ok
test block::tests::test_block_get ... ok
test pin::tests::test_pin_full ... ok

test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s

   Doc-tests ipfsapi

running 4 tests
test src/cat.rs - cat::IpfsApi::cat (line 13) ... ignored
test src/ipns.rs - ipns::IpfsApi::name_resolve (line 13) ... ignored
test src/lib.rs - IpfsApi::new (line 33) ... ignored
test src/pubsub.rs - pubsub::IpfsApi::pubsub_subscribe (line 44) ... ignored

test result: ok. 0 passed; 0 failed; 4 ignored; 0 measured; 0 filtered out; finished in 0.00s

That was run on a IPFS 0.12.x node.

[kallisti5]

@gkbrk any interest in turning the rust crate over to me to maintain if you no longer have time for this project?

You can add an owner on crates.io. Add Owner -> kallisti5

[gkbrk]

This breaks compatibility with any old versions (0.9.0 or before) but makes the crate work with recent versions (0.10.0 - 0.13.0).

I don't think we should care about those versions. Most likely they won't be able to interoperate with the rest of the IPFS network as they extend and change the protocol anyway. Even if they don't, it's not a good security practice to run those versions I think.