replaced calls of 'currp' by the correct access function chThdGetSelfX()
Minor fixes and enhancements.
Minor optimizations regarding memory utilization.
Introduced a POSIX-like thread hierarchy system in ChibiOS (addad a patch) and adapted AMiRo-OS accordingly.In the process ChibiOS has been updated as well.
minor enhancement of the shell thread main function declaration
All contents of the os/ folder has been moved one directory up.
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