Fixed issue where file handler would sometimes return null for existing files; Optimized LIVELOAD file handler.

[Katsute]

Prerequisites

If all checks are not passed then the pull request will be closed.

• My code follows the style listed in CONTRIBUTING.
• I have checked that no other similar pull requests already exists.
• Build compiles.
• Build runs without exceptions.
• I have added/modified documentation (if applicable).
• I have added/modified test cases.

Changes Made

List changes made and/or relevant issues. Please keep changed in reverse chronological order (newest at top).

simplehttpserver/src/main/java/com/kttdevelopment/simplehttpserver/handler/DirectoryEntry.java

Lines 171 to 175 in ab1a8fd

	if(entry == null){ // add new entry if not already added and file exists
	final File file = getFile(path);
	return file != null && file.exists()
	? files.put(context, new FileEntry(file, adapter, loadingOption))
	: null;

• Fixed Folder that exists causes file handler to return null file. #117, The solution was already in the above comment, the bug was just a typo.
• Optimized directory entry (fixed memory issue caused by saving files in liveload).