Support for PC platform (#12)

* improvements for cross-platform compiling

* moved tactility-core to libs/

* splitup improvements

* remove git/gitmodules from freertos

* better platformbetter platform checks

* added build scripts

* delete mbedtls

* re-add mbedtls

* fixes and improvements

* added pc build

* simplify build scripts

* revert build scrpit

* updated builds

* fix for pc

* fix for pc

* fix for build

libs/mbedtls/tests/data_files/server6-ss-child.crt

@@ -0,0 +1,13 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----