Key to (multiple) values storage

Features:

1. Capable to easily store billions of records.
2. Supports record addition only.
3. Support for concurrency.
4. Highly tunable.
5. Very simple.

How to use:

1. Build the mastore binary.

2. Create a store directory (e.g. 'store') in your $HOME.

3. Create mastore.config in your $HOME:

   {
   	"StorePath": "$HOME/store",
   	"MaxAccumSizeMiB": 1024,
   	"MaxCacheSizeKiB": 1024,
   	"MaxIndexBlockSizeKiB": 8192,
   	"MinSingularSizeKiB": 8192,
   	"CompressionLevel": -1,
   	"MaxGoroutines": 1
   }

4. Feed standard input of the binary with strings of form <key>\t<value>:

   mastore write < some_records.txt

5. Read all keys for the stored records:

   mastore read -keys

6. Read records for a specified key:

   mastore read -key=<key>

7. Enjoy!