Add package porting infomation
Revert "make TCP in destiny optional"

This reverts commit 6955a2f7911b9e03b810502d104524a57045a6ca. Though the
general idea makes sense, the implementation should be done in a more
elaborated way.
moved definition of tcp_timer_stack to the correct file
make compilation of sc_heap module dependent
limit maximum payload size to 255 for nativenet if 6lowpan is used
pass border router flag to initialization function
fixed signedness and size of some data types in sixlowpan
fixed some warnings
added some debug output
Fixed doxygen comments, focused on file headers and group definitions
Fixed a lot of comments by removing tabs and correcting format.
Added the boards folder to the doxygen tree

- added boards to riot.doxyfile
- fixed group definitions for all boards
Fixed doxygen inconsistensies in sys
added OFLAGS to Makefile.include for telosb
Merge pull request #251 from haukepetersen/comments

Fixed doxygen comments, focused on file headers and group definitions
add documentation for auto_init (fixes #43)
Merge pull request #424 from OlegHahm/document_auto_init

Document auto init
Merge pull request #431 from thomaseichinger/telosb_oflags

TelosB: added OFLAGS to Makefile.include
Merge pull request #427 from mehlis/hwtimer-debug

added some debug output
Merge pull request #338 from authmillenon/package_porting_doc

Add package porting infomation