1. Add: Exit if connection to redis server failed

1. Add: marshal with type check version. This saves allocations and time if existing data is string or []byte.
2. Fix: Typos.
3. Add: Benchmarks for marshal and marshalWithTypeCheck

1. Add: Check redis connection on setup

1. Add: Save by adding provided prefix.
2. Add: Set() method will add default expiration time.

1. Add: Purge redis cache

1. Add: Redis cache to cache configuration

1. Refactor: Unit tests

Add: Unit tests

1. Fix: panic in redis cache object is nil

added encryption support in fdb

See merge request !128

1. Add: Redis as a cache support for grid mode. Redis implements cacher interface.

1. Add: Cacher interface and cache types. Fastcache implements this interface.

* added encryption support in fdb 
* added feature of dynamic encryption key generation function

fix: fdb delete record

See merge request !126

segregation of pack operation and fdb operations

See merge request !124

added global lock for lazy write in append  bucket 

* removed unused code
* added lock for reading pack file

moved packfile related functions in filemdl and done changes in fdb accordingly

Fix: Error suppressed in CallService()

Closes #5

See merge request !123

1. Fix: Error suppressed in CallService(). This makes users unaware of the actual error from called service.

fix: fail to write fdb index lazily

See merge request !122

added defer for closing file

See merge request !121

File lock code commented

See merge request !120

File lock code commented

added filelock while performing data manipulation on fdb bucket

See merge request !118

Workerpool with cancellable context

See merge request !117

feature of lazy append

See merge request !116

added feature of writing data lazily in corefdb Append bucket file

Get local service data function added

See merge request !114

Get local service data function added

Fix: Multiple FDB issues

See merge request !112