dip: add a -test flag

[crazymonkyyy]

Im using these flags all the time -main -unittest -run, assuming that it be bad to break the "make executable" and "-run" defaults so you cant just make my compile the hard defualt, a single flag that just combines my usual compile would be nice

[adamdruppe]

opend test -run yourprogram.d should do it but maybe i should make -run one of the automatic ones too

[crazymonkyyy]

im not convinced its working

~/src/sreachtest(4)opend -main -unittest -run sreach.d
sreach.d(1): Deprecation: from file datastructures.d should be imported with 'import odc.datastructures;'
sreach.d(24): [unittest] unittest failure
1/2 modules FAILED unittests
(1)~/src/sreachtest(4)opend test -run sreach.d           
(1)~/src/sreachtest(4)

[adamdruppe]

huh maybe i did it wrong looks like the -run did nothing at least ill look later