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_csr.opensslconf

@@ -0,0 +1,10 @@
+[ req ]
+distinguished_name = req_distinguished_name
+prompt             = no
+# Restrict to non-UTF8 PrintableStrings.
+string_mask        = nombstr
+
+[ req_distinguished_name ]
+C  = NL
+O  = PolarSSL
+CN = PolarSSL Server 1