Fix a typo the usage section of the documentation.

When I was reading the docs online I had trouble discerning between `ans.unans` and `ans,unans` because of the font. As a result I mistakenly initially assumed that unans was a property on an object ans. Thinking about it and scrolling through the docs did clear it up somewhat trivially though.

In the hope to prevent others from making the same mistake I've taken the liberty to make insert a space where it was missing.

* Fix warning texts not being printed

* Add legacy style + histfile

* Fix Doc, readme, appveyor

* Add packet fields auto-completion (thanks to @p-l-)

* Pickle, session, interact tests

* Remove trailing line

(or its equivalent on other systems that Linux) => (or its equivalent on other systems than Linux)

Added information about sr() and fuzz() functions, nothing important but useful as well.

Signed-off-by: Fernando Fernández <ffernandezmancera@gmail.com>

Added link to 64bit Python version and added remark that pyreadline and Python should both be 64bits or 32bits.
(Also now link to Python 2.7.13 instead of 2.7.12)

+ Removed old mercurial repo stuff

Fixed some typos and bad whitespaces.

- Removed useless depedencies (Windows)
- Added more links through the doc's parts
- Removed broken links
- Markes scapy v1 as deprecated

Change the cryptographic library used in the following layers:
 * IPSec
 * TLS
 * Dot11

Notes:
 * Fix the WEP key in regression.uts: Should be a 40 bits key (5 ASCII)
   and 24 bits nonce for 64 bits WEP. The key was 8 ASCII => 88 bits
   in total
 * AES-GCM and AES-CMAC algorithms are now native in cryptography: add
   tests in ipsec.uts
 * cryptography only supports Python 2.6+
 * Fix the docstring for the pad method

Removed:
 * MD2 and MD4 hash algorithms for RSA in tls/crypto/pkcs1.py
 * AES-XCBC-96 not supported by cryptography.

Signed-off-by: Thomas Faivre <thomas.faivre@6wind.com>