[configure] Add check for Mono 2.10.9 at config time

As it is said in BXC#11134, MonoDevelop depends on Mono 2.10.9 or newer
so then the configure phase should fail with a friendly error rather than
having a cryptic compiler error.
Merge pull request #255 from knocte/config_fixes

[configure] Add check for Mono 2.10.9 at config time