syncer

Easily keep 2 directories in complete sync. By complete sync I mean their checksums should match!.

Notes/Working -

Changes can be categorized as follows - addition (of new file/folder), deletion (of existing file/folder), modification (of existing file/folder). Renaming would not be given special treatment. It will be treated as (deletion + addition).
To detect whether a file has been modified or not, checksum would be used.
Syncer will store its own metadata in .sync folder within each of the 2 directories in sync. This folder will contain a file details.lastsync, which will hold information about files and folders which were "correctly" synced the previous time. If no sync has happened, this file would not be present.

Syncer should be able to recognize if a previous sync operation got aborted midway. It should not retransmit extra/redundant data.
Syncer should support sync across atleast networked filesystems (over ssh), besides local filesystems.

Should we rename the package? To somethiing like fsyncer/dirsyncer/etc.?
Should we start commiting from sratch, since the commits pushed in now are not for incremental changed. I have pushed in multiple improvements in a single commit.