Fix ln -s command (needs absolute path) in README
Fix ln -s command (needs absolute path) in README

Signed-off-by: Woody Gilk <15b32a2895584d6f8bad9b9e48bbcfc3a0d6b1e2@kohanaframework.org>

candeira/git-encrypt,miraclhq/git-encrypt,sergey-ob/git-encrypt,kinnalru/gitcrypt,spector-in-london/git-encrypt,marcind/git-encrypt,denis-vilyuzhanin/git-encrypt,kinnalru/gitcrypt,janzhou/git-encrypt,almendro/git-encrypt