Add an option to decrypt only header when guessing.

Since the match of extension only compares the first few bytes of decrypted header, it's inefficient to decrypt the whole buffer. We limit the decrypted size in default now, and it can be 20 times faster than the previous version.

Be careful, if you would like to specify your own searching pattern, please use -d argument to custom the decrypted size. For instance, you can use -d 0 to specify the whole file or use -d 10 to select the first ten bytes.

Add folder selection support and some minor features.

add:

• directory decryption support
• circular tickcount
• termination support
• seed reuse
• candidates limit

Rename project to Prometheus-Decryptor

This decryptor is actually for Prometheus ransomware instead of Thanos.

Add GUI version.

Merge pull request #1 from frozenkp/patch-1

Fix GUI.png

1.0

fix typo