Include install target
Do a make all before a install
Fix compiles to be position-independent

The objects need to be compiled as position independent code, so that they can be linked into a library, otherwise we get such compiler errors on some platforms:
/usr/bin/ld: obj/ntru_crypto_drbg.o: relocation R_X86_64_32S against `.bss' can not be used when making a shared object; recompile with -fPIC
Added install target

I do not have a MacOS system, so please test and adapt on Darwin where necessary.
Changes were in the wrong directory
Added install target

I do not have a MacOS, so please make sure it is correct for Darwin
Fix compiles to be position-independent
Merge pull request #15 from thesourcerer8/master

Build fixes + Installation routine