add "modify" option to add, remove and replace attributes

Merge pull request #6 from Lagerregal/master

Add "modify" option to add, remove and replace attributes

Upgrade to Swift 4.0

Using a public website to perform tests.

Fixing invalid setter issue

1.1.4

Fixing invalid setter issue.

Cleanup Document

1.1.3

Correcting Typos

improving SASL document / adding a sample krb5.conf

1.1.2

Improving SPNEGO / MD5 Application

Updating GSSAPI mech & its test script.

Updating GSSAPI testing script

Also adding a reference krb5.conf for the test script

Adding Documents

1.1.0

Cleanup Documents

Enabling TLS

1.0.9

Testing Modify()

Drafting Fundamental Supports for SASL Authentication

1.0.8

Preparing Basic SASL Supports for LDAP

Adding Server Side Sort Control

1.0.7

Adding Server Control to Search()