irc-client.0.1.1 - restrict to OCaml >= 4.00.1

Signed-off-by: John Else <john.else@citrix.com>
irc-client.0.1.1 - fix build against oUnit 2

Signed-off-by: John Else <john.else@citrix.com>
irc-client.0.1.0 - restrict to OCaml >= 4.00.1

Signed-off-by: John Else <john.else@citrix.com>
irc-client.0.1.0 - fix build against oUnit 2

Signed-off-by: John Else <john.else@citrix.com>
Merge pull request #1425 from johnelse/irc-client.0.1.1-fix

irc-client.0.1.0/irc-client.0.1.1 build fixes