send compiler errors to TeamCity

This will add the compiler errors to teamcity's list of errors so you dont have to browse the build log to find them.
I have only tried this with TeamCity 8 EAP.
![teamcity_error](https://f.cloud.github.com/assets/185207/509511/19aed740-bda6-11e2-9b8f-82ccfecb6056.png)