update copyright info

update license to GPLv2 and GPLv3

[6LoWPAN] - Improved interface with MAC-enabled device drivers. TODO: update units, check return types

[6LoWPAN-LL] - Updated to more generic 6LoWPAN addresses

[6LoWPAN-LL] - Moved header processing to generic 6LoWPAN link layer

[IEEE802.15.4] - A more generic approach for link layer protocols

[IEE802.15.4] - Fix parentheses

[IEEE802.15.4] - refactored

[IEEE802.15.4] - REFACTORING - WIP: Sending side of IEEE802.15.4 layer almost finished. Receiving side and units will be provided tomorrow.

[IEEE802154] - Added some address utility functions

[IEEE802154] - Setup tests for IEEE802.15.4

[6LoWPAN] - Fixed -Wcast-align violations

Added first simple functional test for 6LoWPAN

6LoWPAN: More CS violations fixes

6LoWPAN: Fixed sign/parenthesis on two macros

[6LoWPAN] - Better handling of IEEE802.15.4-addresses

[6LoWPAN] - Shorter naming

[pico_device] - Added L2-mode to pico_device-structure

[6LOWPAN] LOWPAN_IPHC Compression & Decompression

20/08

Updated Copyright information.

Added support for linux kernel.

- Also, removed standard includes from several files

Cleaned up warnings from gcc-arm

struct pico_eth made PEDANTIC for ARM-RVCT

More __packed attributes for ARM-RVCT Compiler

Added PACKED_UNION_DEF for unions contained in packed structs, just to

please ARM-RVCT20

Removed more gcc warnings on vinz machine

Changes for IAR/EWARM

Got rid of ugly anonymous unions

Fixed non-compliant header guard names

Added uncrustify. Enforced some coding rules. Added "make style" target.

Github Issue #17: Enabled more Warning flags, fixed all warnings.

Task #549 rename module IGMP2 to IGMP

Changed LICENSE to GPL2. Removed the do-not-distribute clause from the source headers

Stack entry of IGMPv2 i host functionality #223

Refactored ARP to fix the "unreachable" bug (see #201)

Maybe still a small frame memory leak when the destination is unreachable

Added copyright notice on top of each file.

(closes issue #100)

Working bidirectional udp

Implemented basic icmp skeleton

Added vde test

Reorganized directory structure.