Saving MS Office document could cause a sync loop.

[wizzard]

Hitting MS Office document "save" button several times during a short period of time could cause an infinite sync loop.

Steps to reproduce:

• Start 2x megacli application, sync two local folders to the same remote folder.
• Start MS Office, create a document, save it in the local synced folder.
• Wait for a full sync in both megacli.
• Now type something quickly and press "CTRL +S" to save the changes.
• Repeat previous step 4-5 times.
• both megacli get into infinite sync loop.

Sending:
2 files added or updated
1 user received or updated
Sync - state change of node test.docx to Syncing
Sync - state change of node  to Syncing
Sync - state change of node test.docx to Synced
Sync - state change of node  to Synced
Sync - state change of node test.docx to Pending
Sync - state change of node  to Pending
Sync - creating remote file test.docx by copying existing remote file
Sync - state change of node test.docx to Syncing
Sync - state change of node  to Syncing
POST target URL: https://g.api.mega.co.nz/cs?id=nldxyghcjb&sid=y6kHA6CM5mAz7Bn4vhhH8nN3TmpUZmQ0Nld
Sending: [{"a":"p","i":"hbmnohybow","t":"5VcRmRiT","n":[{"h":"lZtViBRJ","t":0,"a":"3eoKLmTAkSblRG-
hvuCZxAIAz01drvYyQE","ts":1400965249}]},{"a":"m","i":"hbmnohybow","n":"IdMxRYKA","t":"JRkmyBKJ"}]
MEGA> Received: [{"f":[{"h":"wRdnxBAA","t":0,"a":"3eoKLmTAkSblRG-Xk5mpUrltuExonDzB6VnUsfyNqeZ5zhQG
"ts":1400965249,"p":"5VcRmRiT","u":"swNjTfd46WQ","s":11262}]},0]
Sync - state change of node test.docx to Synced
Sync - state change of node  to Synced
2 files added or updated
MEGA> Received: {"a":[{"a":"t","i":"hbmnohybow","t":{"f":[{"h":"wRdnxBAA","t":0,"a":"3eoKLmTAkSblR
580ryU2oJXtu4uhvuCZxAIAz01drvYyQE","ts":1400965249,"p":"5VcRmRiT","u":"swNjTfd46WQ","s":11262}]},"
ow","t":{"f":[{"h":"IdMxRYKA","p":"JRkmyBKJ","u":"swNjTfd46WQ","t":0,"a":"ssSqO-Xs6ldJTBYLnSDWwxmq
ZvtUYw7LUOlomZmhByYyfU","s":11412,"ts":1400965729,"tdm":-447}],"u":[{"u":"swNjTfd46WQ","m":"spoh21
O-Xs6ldJTBYLnSDWwxmqtZNSUqUeflbOg3p5hl7hDLxLhKEuhd0OcSTCrwFaI6WEKQiyUSu4szL7Ete19Q","k":"swNjTfd46
1412}]},"ou":"swNjTfd46WQ"},{"a":"d","i":"dgvgahiblt","n":"wRdnxBAA","ou":"swNjTfd46WQ"},{"a":"t",
Xk5mpUrltuExonDzB6VnUsfyNqeZ5zhQGKuxm8nPAkf7k23-n4_UbK2RZ83fgv7x8TvpSEg","k":"swNjTfd46WQ:64rw2rZ3
":"spoh21@gmail.com"}]},"ou":"swNjTfd46WQ"}],"sn":"yKmp_K_FTiw"}
POST target URL: https://g.api.mega.co.nz/sc?sn=yKmp_K_FTiw&sid=y6kHA6CM5mAz7Bn4vhhH8nN3TmpUZmQ0Nl
Sending:
2 files added or updated
1 user received or updated
Sync - state change of node test.docx to Syncing
Sync - state change of node  to Syncing
Sync - state change of node test.docx to Synced
Sync - state change of node  to Synced
Sync - state change of node test.docx to Pending
Sync - state change of node  to Pending
Sync - creating remote file test.docx by copying existing remote file
Sync - state change of node test.docx to Syncing
Sync - state change of node  to Syncing
POST target URL: https://g.api.mega.co.nz/cs?id=nldxyghcjc&sid=y6kHA6CM5mAz7Bn4vhhH8nN3TmpUZmQ0Nld
Sending: [{"a":"p","i":"hbmnohybow","t":"5VcRmRiT","n":[{"h":"lZtViBRJ","t":0,"a":"3eoKLmTAkSblRG-
hvuCZxAIAz01drvYyQE","ts":1400965249}]},{"a":"m","i":"hbmnohybow","n":"cNcGCJYA","t":"JRkmyBKJ"}]
MEGA> Received: [{"f":[{"h":"lRcS2RjQ","t":0,"a":"3eoKLmTAkSblRG-Xk5mpUrltuExonDzB6VnUsfyNqeZ5zhQG
"ts":1400965249,"p":"5VcRmRiT","u":"swNjTfd46WQ","s":11262}]},0]
Sync - state change of node test.docx to Synced
Sync - state change of node  to Synced

As well reproduced issue #26 (haven't seen this issue on Windows for a long time!). Remote folder had 4x test.docs files.