Fix gitignore to not ignore default modules folder

/modules/** makes git ignore all directories and files in /modules, so
it's not even looking in /modules/default for changes.
!/modules/default/** is therefore never used. By adding the new line
!/modules/default, git is told to look in the /modules/default folder
for changes and will find all sub files/dirs and match these on
!/modules/default/**.

.gitignore

@@ -59,6 +59,7 @@ Temporary Items
 
 # Ignore all modules except the default modules.
 /modules/**
+!/modules/default
 !/modules/default/**
 !/modules/README.md**
 

CHANGELOG.md

@@ -7,6 +7,9 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 ### Added
 - Add loaded function to modules, providing an async callback.
 
+### Fixed
+- Update .gitignore to not ignore default modules folder
+
 ## [2.1.0] - 2016-12-31
 
 **Note:** This update uses new dependencies. Please update using the following command: `git pull && npm install`