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/enco-cert-utf8str.pem

@@ -0,0 +1,14 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----