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/server7.key

@@ -0,0 +1,5 @@
+-----BEGIN EC PRIVATE KEY-----
+MHcCAQEEILBDMs7bRVxVg6ovTpf2zB9m+22jY7R3LNKRvCPfa6YJoAoGCCqGSM49
+AwEHoUQDQgAEHG336dql6qGcsnIZqAkcc63eFbvepuOzTwXobRAuOmk3l4A5wXX/
+vs5wAawLX1wUTUM/AESHmAZrJK9tq5So8g==
+-----END EC PRIVATE KEY-----