A collection of small fixes (#198)

* tests: Remove if-pyramids

* tests: Switch run_command arguments

* tests: Make run_command a vararg function

* tests: Xcode doesn't obey CMake's test working directory

* openssl: move manual AES-CTR cipher into crypto init

* cmake: Move our include dir before all other include paths

src/crypto.h

@@ -194,6 +194,4 @@ int _libssh2_pub_priv_keyfilememory(LIBSSH2_SESSION *session,
                                     size_t privatekeydata_len,
                                     const char *passphrase);
 
-void _libssh2_init_aes_ctr(void);
-
 #endif