Use eshell more fully

Emacs now starts on eshell by default. Also it uses xterm-colors package for
coloring, instead of default ansi-colors

elisp/extras.el

@@ -38,6 +38,9 @@
   (load "~/.emacs.d/elisp/openwith-setup.el"))
 
 ;; Programming environment
+;; We need colors in eshell
+(use-package xterm-color)
+
 ;; git
 (use-package magit)