Git 2.2.0-rc3

1. 7b64d42 hashmap: add string interning API by Karsten Blees · 11 years ago
2. ab73a9d hashmap: add simplified hashmap_get_from_hash() API by Karsten Blees · 11 years ago
3. 039dc71 hashmap: factor out getting a hash code from a SHA1 by Karsten Blees · 11 years ago
4. b6aad99 hashmap.h: use 'unsigned int' for hash-codes everywhere by Karsten Blees · 12 years ago
5. 6a364ce add a hashtable implementation that supports O(1) removal by Karsten Blees · 12 years ago