Ngt

What's Changed
* add rebuild command description by irokaru in https://github.com/yahoojapan/NGT/pull/178
* resolve issue 167
* resolve the search issue in ngtpy

New Contributors
* irokaru made their first contribution in https://github.com/yahoojapan/NGT/pull/178

**Full Changelog**: https://github.com/yahoojapan/NGT/compare/v2.3.11...v2.3.12

**Full Changelog**: https://github.com/yahoojapan/NGT/compare/v2.3.10...v2.3.11

**Full Changelog**: https://github.com/yahoojapan/NGT/compare/v2.3.9...v2.3.10

What's Changed
* fix narrowing conversion error by chenrui333 in https://github.com/yahoojapan/NGT/pull/177

New Contributors
* chenrui333 made their first contribution in https://github.com/yahoojapan/NGT/pull/177

**Full Changelog**: https://github.com/yahoojapan/NGT/compare/v2.3.8...v2.3.9

- Fix the issue of createIndex not stopping for inconsistent indices.
- Add the C API function to set the epsilon for creation.
- Add the option where the size of the exploration data is defined by epsilon.

**Full Changelog**: https://github.com/yahoojapan/NGT/compare/v2.3.7...v2.3.8

**Full Changelog**: https://github.com/yahoojapan/NGT/compare/v2.3.5...v2.3.7