added global lock for lazy write in append  bucket 

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

File lock code commented

added feature of writing data lazily in corefdb Append bucket file

1. Fix: Failed to fetch data after FDB Update operation

1. Add: Return updated records in case of update

add encryption and compression support for pack bucket

1. Fix: Lazy object expired from cache resulting in failed operations.
2. Fix: Success on update operation in pack even if object with primary key is not present.

soft delete database and slsdashboard changes

1. Fix: Data updated but error thrown because of deleted records.

1. Fix: Atomic file not updated, Hard link issue.
2. Add: Create temp directory if not present at app root.

now we dont have to specify each index field in selector to update record

1. Fix: Bad connection error on mysql connection reset.

1. Fix: Data not updated because of safe write

1. Fix: Bucket id generated for existing bucket

1. Add: FileType key constant

Delete function wrapper and function name changes

1. Add: Use custom save function for lazy writer

1. Add: Logs and comments

1. Add: Lazy writer support to write index files.
2. Fix: Index JSON not updated in case of update data.

Coremongo package update

added reindexing feature in fdb,
added filepack module,
modification in filemdl module

1. Fix: Server connecting to 0 port if not provided

1. Fix: Panic if data to bulk functions is empty array.