fixed #3, cleared up confusing directory names in example helptext

acme_tiny.py

@@ -179,11 +179,11 @@ and have access to your private account key, so PLEASE READ THROUGH IT! It's
 only ~200 lines, so it won't take long.
 
 ===Example Usage===
-python acme_tiny.py --account-key ./account.key --csr ./domain.csr --acme-dir /usr/share/nginx/html/.well-known/acme-challenges/ > signed.crt
+python acme_tiny.py --account-key ./account.key --csr ./domain.csr --acme-dir /usr/share/nginx/html/.well-known/acme-challenge/ > signed.crt
 ===================
 
 ===Example Crontab Renewal (once per month)===
-0 0 1 * * python /path/to/acme_tiny.py --account-key /path/to/account.key --csr /path/to/domain.csr --acme-dir /usr/share/nginx/html/.well-known/acme-challenges/ > /path/to/signed.crt 2>> /var/log/acme_tiny.log
+0 0 1 * * python /path/to/acme_tiny.py --account-key /path/to/account.key --csr /path/to/domain.csr --acme-dir /usr/share/nginx/html/.well-known/acme-challenge/ > /path/to/signed.crt 2>> /var/log/acme_tiny.log
 ==============================================
 
 """)