Add Margin for NoSpace

Merge pull request #47 from fanap-infra/margin-for-NoSpace

add space for no margin

Fix NoSpace on roaring

Add Array Unset in roaring

Fix open files map thread safe

Merge pull request #45 from fanap-infra/fix/make-openfiles-map-safe-t…

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change fs write interface

Handle corrupted file index

Merge pull request #44 from fanap-infra/handle-corrupted-fileIndex

handle corrupted file index

handle nospace method select opened file

Merge pull request #43 from fanap-infra/fix/nospace-can-not-remove-file

if file is opened before try another

Add Header Recovery Mechanism

Merge pull request #42 from fanap-infra/fix/header-recovery

recovering file indexes

Handle wrong binary for fileIndex

Merge pull request #40 from fanap-infra/fix/handle-nil-map-in-fileIndex

make map in file Index proto is nil

Use one block allocation map for all opened virtual files

pass first blm to virtual file in openVirutalFile function

Expose Header package

move header package from internal to pkg

Fix NoSpace Remove virtual file

If selected virtual file is empty, try again and select another file