make test and c color formatting in README

Makefile

@@ -5,4 +5,4 @@ clean:
 	rm -f test cvec.o cvec.a
 
 test: clean lib
-	gcc -Wall -Werror -O2 testing/test.c cvec.a -o test
+	gcc -Wall -Werror -O2 -static testing/test.c cvec.a -o test && ./test

README.md

@@ -9,7 +9,7 @@ The overall usage should be done via shipped cvec_* functions, but in case of th
 
 This snippet should give you the general idea of usage.
 
-```
+```c
 cvec vec = cvec_new(sizeof(size_t), 1);
 size_t val = 0x15dc;
 cvec_put(&vec, &val);