Warning (emacs): Unable to activate package `helm-ag'.
Required package `helm-1.7.7' is unavailable
M-x package-list-packages RET
Select and install `helm-ag'
M-x el-get-install RET helm-ag
Folowing the install log.
Warning (el-get): The package `helm-ag' has already been loaded by
package.el, attempting to load el-get version instead. To avoid
this warning either uninstall one of the el-get or package.el
version of helm-ag, or call `el-get' before `package-initialize' to
prevent package.el from loading it.