Update a number of short descriptions to be 100 characters or less to…

… reflect the new Hub length restriction

buildpack-deps/README-short.txt

@@ -1 +1 @@
-A collection of common build dependencies, especially useful for installing arbitrary modules such as gems where build dependencies can't easily be determined beforehand.
+A collection of common build dependencies used for installing various modules, e.g., gems.

clojure/README-short.txt

@@ -1 +1 @@
-Clojure is a dialect of the Lisp programming language designed to run atop of the Java Virtual Machine. Clojure is a general-purpose programming language with an emphasis on functional programming.
+Clojure is a dialect of Lisp that runs on the JVM.

gcc/README-short.txt

@@ -1 +1 @@
-The GNU Compiler Collection (GCC) is a compiler system produced by the GNU Project that supports various programming languages.
+The GNU Compiler Collection is a compiling system that supports several languages.

hylang/README-short.txt

@@ -1 +1 @@
-Hy is a dialect of the Lisp programming language designed to interoperate with Python by translating expressions into Python's abstract syntax tree (AST).
+Hy is a Lisp dialect that translates expressions into Python's abstract syntax tree.

java/README-short.txt

@@ -1 +1 @@
-Java is a computer programming language that is concurrent, class-based, object-oriented, and specifically designed to have as few implementation dependencies as possible.
+Java is a concurrent, class-based, and object-oriented programming language.

mongo/README-short.txt

@@ -1 +1 @@
-MongoDB is a document database that provides high performance, high availability, and easy scalability.
+MongoDB document databases provide high availability and easy scalability.

mysql/README-short.txt

@@ -1 +1 @@
-MySQL is the world's second most widely used open-source relational database management system (RDBMS).
+MySQL is a widely used, open-source relational database management system (RDBMS).

node/README-short.txt

@@ -1 +1 @@
-Node.js is a software platform for scalable server-side and networking applications. Node.js applications are written in JavaScript and run within the Node.js runtime on Mac OS X, Windows, and Linux.
+Node.js is a JavaScript-based platform for server-side and networking applications.

php/README-short.txt

@@ -1 +1 @@
-PHP is a server-side scripting language designed for web development, but which can also be used as a general-purpose programming language.
+While designed for web development, the PHP scripting language also provides general-purpose use.

postgres/README-short.txt

@@ -1 +1 @@
-PostgreSQL is a powerful, open source object-relational database system. It has a proven architecture that has earned it a strong reputation for reliability, data integrity, and correctness.
+The PostgreSQL object-relational database system provides reliability and data integrity.

python/README-short.txt

@@ -1 +1 @@
-Python is an interpreted, interactive, object-oriented, open-source programming language. It incorporates modules, exceptions, dynamic typing, very high level dynamic data types, and classes.
+Python is an interpreted, interactive, object-oriented, open-source programming language.

rails/README-short.txt

@@ -1 +1 @@
-Ruby on Rails is an open-source application framework written in Ruby. It emphasizes best practices such as convention over configuration, active record pattern, and the model-view-controller pattern.
+Rails is an open-source web application framework written in Ruby.

redis/README-short.txt

@@ -1 +1 @@
-Redis is an open source, BSD licensed, advanced key-value store. It is often referred to as a data structure server since keys can contain strings, hashes, lists, sets and sorted sets.
+Redis is an open source key-value store that functions as a data structure server.

ruby/README-short.txt

@@ -1 +1 @@
-Ruby is a dynamic, reflective, object-oriented, general-purpose, open-source programming language. It supports multiple programming paradigms, including functional, object-oriented, and imperative.
+Ruby is a dynamic, reflective, object-oriented, general-purpose, open-source programming language.

wordpress/README-short.txt

@@ -1 +1 @@
-WordPress started as just a blogging system, but has evolved to be used as full content management system and so much more through thousands of plugins, widgets, and themes.
+The WordPress rich content management system can utilize plugins, widgets, and themes.