major fix for hip_net.go ConfigLoopsHip, other fixes

[rcoreilly]

adds to std Axon events, and PlusPhase:Start must go before axon version. also nuked old hip dir, moved md to HIP.md, use new emer fun to make rep idxs small for big hip layers so raster plot is usable, etc.

[codecov[bot]]

Codecov Report

Patch coverage has no change and project coverage change: -0.10% :warning:

Comparison is base (c2a7f93) 30.10% compared to head (09d8f4c) 30.00%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #289 +/- ## ========================================== - Coverage 30.10% 30.00% -0.10% ========================================== Files 85 85 Lines 15341 15389 +48 ========================================== Hits 4618 4618 - Misses 10459 10507 +48 Partials 264 264 ``` | [Files Changed](https://app.codecov.io/gh/emer/axon/pull/289?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=emer) | Coverage Δ | | |---|---|---| | [axon/hip\_net.go](https://app.codecov.io/gh/emer/axon/pull/289?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=emer#diff-YXhvbi9oaXBfbmV0Lmdv) | `0.00% <0.00%> (ø)` | | | [axon/layerbase.go](https://app.codecov.io/gh/emer/axon/pull/289?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=emer#diff-YXhvbi9sYXllcmJhc2UuZ28=) | `43.77% <0.00%> (-1.68%)` | :arrow_down: | | [axon/looper.go](https://app.codecov.io/gh/emer/axon/pull/289?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=emer#diff-YXhvbi9sb29wZXIuZ28=) | `0.00% <0.00%> (ø)` | |

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[rcoreilly]

discussed with Alan..