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
Merge pull request #421 from OlegHahm/revert_tcp_optional

Revert tcp optional
fixes startup code and adds proper irq handler for mc1322x
changed CFLAGS to CFLAGS_BASIC (no -mthumb flag)
remove isr.c to change interrupt handling to VIC model
added basic install_irq function
change to the mc1322x IRQ handling
since mc1322x lacks a VIC this is a kind of SW VIC with low latency and
compatibility to the VIC API in mind.
fixed interrupt handling for hwtimer
hwtimer_wait issue fixed
changed copyright statement
Merge pull request #262 from thomaseichinger/vic

mc1322x change to a VIC like interrupt system
use $(CC) for *.S files
transceiver return signed values for sending

negative values indicate an error value
Merge pull request #382 from OlegHahm/transceiver_return

transceiver return signed values for sending
Merge pull request #440 from LudwigOrtmann/use_cc_make_variable

use $(CC) for *.S files