updated readme with project information

README.md

@@ -1,2 +1,66 @@
 # LEDsign
 
+LEDsign is a project designed to perform a very specific goal: allowing a user to build a list of customizable effects using the LEDsign Android application. Next, the user can decide to upload this list of effects (called a profile) to an Arduino circuit via Bluetooth. This circuit will then render the effects designed in the application.
+
+The purpose of this project may seem very niche and that is because it was created entirely with the intention of being a learning exercise and as a fun side project rather than a useful tool of some sort.
+
+---
+
+### Demonstration
+
+`// todo - insert demo video`
+
+---
+
+### Features
+
+* Easy-to-use effects list customizer
+  * drag effects to reposition them in the list
+  * modify, duplicate or delete effects
+* Instant effect previewing
+  * 3D preview automatically updates when effects are added, modified, or removed
+* Touch-support on 3D preview
+  * swipe to rotate the preview
+  * tap HUD elements for quick actions
+* Effects profile saving/loading
+  * saves to internal storage
+  * modify, duplicate or delete existing profiles
+* Quick BlueTooth connecting for paired devices
+* Profile uploading to Arduino
+* Customizable preferences
+  * change default profile names
+  * enable day/night theme
+  * selectable app-wide accent color
+  * modify 3D preview preferences
+* Help pages with topics that can be swiped to reach next one
+  * built-in video instructions
+  * additional written instructions
+* About page with app external library information
+  * tap an item to browse to its home URL
+
+---
+
+### External Libraries
+
+* #### Android
+  * [Processing for Android](https://android.processing.org/)
+  * [Gson](https://github.com/google/gson)
+  * [Android Support Libraries](https://developer.android.com/topic/libraries/support-library)
+  * [Material Navigation Drawer](https://github.com/kanytu/Android-studio-material-template)
+  * [ExpandableTextView](https://github.com/Manabu-GT/ExpandableTextView)
+  * [SwipeRevealLayout](https://github.com/chthai64/SwipeRevealLayout)
+
+
+* #### Arduino
+  * [Adafruit NeoPixel](https://github.com/adafruit/Adafruit_NeoPixel)
+  * [Adafruit NeoMatrix](https://github.com/adafruit/Adafruit_NeoMatrix)
+  * [Adafruit GFX](https://github.com/adafruit/Adafruit-GFX-Library)
+
+---
+
+### Specifications
+
+* **Android/Java** for application development *(supports Android 9.0+)*
+* **Processing** for application's 3D sketch
+* **Arduino Uno** for hardware support
+* **BlueTooth** for application/Arduino communication