Improve performance, err handling & readability

1. Download your OS's version of the program from below.
   • TypeScript_to_JavaScript.exe: Windows
   • TypeScript_to_JavaScript: Linux
2. Add a scripts.ts file in the same directory, or remember to set the -file command-line-argument if it is outside the program's directory.
3. Run the program with the following potential flags:

-file string
    Path to the TypeScript file. (default "scripts.ts")
-minify bool
    Minify the JavaScript output.
-stream float64
    File streaming minimum threshold in megabytes. (default 2.5)

Initial Release

1. Create a scripts.ts file with contents.
2. Download typescript2javascript.exe for Windows users or typescript2javascript for Linux users and place it in the same directory as scripts.ts.
3. Run the program with optional parameters to -minify or -stream=### (to increase the file streaming limit in MB).