No longer requires Emacs 24.4

Requirement of 24.4 was dropped with pidu/git-timemachine#3
removed solarized-theme -- duplicate of color-theme-solarized
Don't install insecurely without el-get-allow-insecure.

In most cases, we assume any connection is insecure unless the URL
starts with "https://", "$USERNAME@", or "ssh". There are a few
exceptions: I'm assuming all Emacswiki packages are insecure, and I
don't think we can know whether packages installed via Google Go are
secure or not.
Set el-get-allow-insecure to avoid breakage.

This should be changed to nil in a future major release bump.
Document el-get-allow-insecure in manual.
add recipe ac-helm
add mode-icons
add git-auto-commit-mode
Merge pull request #1856 from technomancy/allow-insecure

Don't install insecurely without el-get-allow-insecure.
Merge pull request #1859 from stardiviner/add-recipe-ac-helm

add recipe ac-helm
Merge pull request #1860 from thiagowfx/mode-icons

add mode-icons
Merge pull request #1861 from thiagowfx/git-auto-commit-mode

add git-auto-commit-mode
Set properly the binary path that SHM calls.
Merge pull request #1833 from SamHasler/patch-1

git-timemachine no longer requires Emacs 24.4
Merge pull request #1862 from vonavi/shm

Set properly the binary path that SHM calls.
color-theme-solarized: add some comments

Note that recipe supports color-theme & custom-them
Merge branch 'solarized-duplicate'