Update README.md

Author: TrickyFatCat

README.md

@@ -2,3 +2,32 @@
 
  A collection of blueprint function libraries.
 
+## Installation
+
+The plugin can be used in both C++ and Blueprint projects.
+
+### Blueprint projects
+
+**At the moment, the package is compatible only with Unreal Engine 4.**
+
+1. Download [**package file**](https://github.com/TrickyFatCat/TrickyFunctionLibrary/releases/tag/v1.0);
+2. Unzip the package to the Plugins folder in engine folder, e.g. `C:\Program Files\Epic Games\UE_4.27\Engine\Plugins`;
+3. Restart the project;
+
+In this case the plugin can be used for any blueprint project.
+
+### C++ projects
+
+1. Create the Plugins folder in the project directory;
+2. Create the TrickyAnimationComponents folder in the Plugins folder;
+3. Download the plugin source code into that folder;
+4. Rebuild the project;
+
+## Functions
+
+1. `ConvertTimeSeconds` - converts given time in seconds to different time formats;
+2. `SetTimelineRateToTime` - sets timeline play rate to play as long as target time;
+3. `GetPlayerCharacterViewPoint` - returns player characters viewpoint location and rotation;
+4. `ApproachInt32` - changes the given int32 variable  by a given delta value up to a target value.
+5. `ApproachFloat` - changes the given float variable  by a given delta value up to a target value.
+4. `ApproachInt32` - changes the given vector variable  by a given delta value up to a target value.