Fixed showing current tasks
Reduced log noise from ShellTask and runNested
Default server instance uses copy of resources dir

Prevoiusly, worked directly in the resources source directory and thus
was able to modify the source files. Also, .git directories are called
dot_git in the source path and thus the load tasks were wrong
resources uses environment variable TMP_PATH if exists
loadSite() is git 1.7.0-compatible (for heroku)
LoadSiteTask._getIsClean() discards the index

We don't need the index, and it may be corrupt