fix #11: initialize queue_node_t n.next in msg_send()
fix for #87, replacing - with _ in module protocol_multiplex
fixed #18 for ICMPv6 packets
add cc110x_ng include path to transceiver module
fixes for #62: eliminate unused parameter warnings

NOTE: this commit introduces a kernel API change for mutex_unlock
fixing for #79: relocating rpl folder
some prototype fixes in RPL
Update .gitignore
Merge pull request #90 from OlegHahm/milestone_1_0_fixes

Milestone 1 0 fixes
Merge pull request #101 from authmillenon/master

Update .gitignore