Several grammatic edits to introductory topics to improve readability and flow.
Merge pull request #416 from thinkhuman/gh-pages

Several grammatic edits to introductory topics to improve readability.
Heroku supports PHP. Fix link.

Heroku PHP support is now GA.
https://blog.heroku.com/archives/2014/7/15/the_new_php_on_heroku_now_generally_available
Merge pull request #420 from iakio/patch-1

Heroku supports PHP. Fix link.
Fix menu links for "welcome" anchors.

In the `index.html`, `{{ welcome_content |markdownify }}` generates name
attributes for header tags like "my-title", whereas `{{ post.content }}`
generates name attributes like "my_title".

This fixes the links for only the welcome menu items so that the anchors
in the menu match the different name format.
Change branch names from "master" to "gh-pages".
Merge pull request #423 from jwpage/welcome_anchors

Fix menu links for "welcome" anchors.
Merge pull request #424 from jwpage/contributing_master

Change branch names from "master" to "gh-pages".
Fixed wrong link for Propel
Merge pull request #425 from marcj/patch-1

Fixed wrong link for Propel
New stable PHP version released (5.6)

http://php.net/archive/2014.php#id2014-08-28-1
updated to PHP 5.6 in getting started chapter
books and PHP 6 updates
Merge pull request #428 from peterkokot/patch-1

Updated to PHP 5.6 in getting started chapter
Merge pull request #429 from FranciscoP/patch-1

New stable PHP version released (5.6)
Merge pull request #430 from peterkokot/patch-php7

Books and PHP 6 updates
Merge pull request #1 from codeguy/gh-pages

Merge repo