add IPv4-mapped support to conversions
Merge pull request #22 from skion/ipv4-mapped

add IPv4-mapped support to conversions
simplify bin()

string formatting should be done via % instead of +;
it is faster etc.  why use "list.reverse" only if
"reversed" is unavailable?  it is even in python 3.
Some small PEP8 style fixes - Line under indention
Fixed in_network function - returned false results

https://github.com/tehmaze/ipcalc/issues/19
https://github.com/tehmaze/ipcalc/issues/4

The return is now better to read. The rule for detecting if an IP
address is within the network is:
Address <= Testing IP <= Broadcast

This function has only the ability to check an IP address by assuming
the netmask as /32 (IPv4) or /128 (Ipv6). If the tested IP has a
netmask greater than our network it will probably fail.
New function - check_collision(), in_network() deprecated

The new function check_collisions() needs an IP address as argument. It
can be a single address or a complete network. It checks the networks
against each other and returns true if any collisions will be found.
This function is an improvement of the function in_network(). So,
in_network is now marked as deprecated and prints a warning when being
used.
Added license file 

Closing issue #24
Merge pull request #25 from craneworks/master

Fixing bug #4 and #19, new function check_collision
Use warnings.warn here
Simplify package structure, as suggested by gandaro in issue #23
Version 1.1.0

In this version Network.in_network got deprecated in favour of
Network.check_collision.
Change condition in check_collision.
Merge pull request #26 from sleeper-service/master

Change condition in check_collision. I think there may be a typo in the second comparison.
Changed warning stacklevel to 2, so you can actually see what calls Network.in_network
Use Network.check_collision (as referenced in issue #26)
Version 1.1.1
Reference contributers in thanks