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/server1.req.sha256.conf

@@ -0,0 +1,17 @@
+req_extensions = req_ext
+
+[req_ext]
+extendedKeyUsage = serverAuth
+subjectAltName = @alt_names
+
+[alt_names]
+email = mail@example.com
+DNS = example.com
+dirName = dirname_sect
+IP = 127.0.0.1
+URI = http://pki.example.com
+
+[dirname_sect]
+C=UK
+O=Mbed TLS
+CN=Mbed TLS directoryName SAN