get working in new git-for-windows and conemu

[travi]

• [x] get symlinks working
• [x] which output
• [x] ssh agent
• [x] prompt colors
• [x] clear
• [x] prints over existing text
• [x] CA cert validation
• [x] version the ConEmu config
• [ ] is it possible to use 256 colors?
• [ ] create/transfer ssh key (is ssh-agent forwarding an option for when Windows is in a VM?)

notes:

• bash v4
• tput exists
• does not appear to support 256 colors

[travi]

prompt colors might be a matter of not enough colors being available? http://stackoverflow.com/questions/19710074/tput-color-definitions-for-windows-git-shell#answer-19710326

tput info:

• http://linux.101hacks.com/ps1-examples/prompt-color-using-tput/