* updated link in the Java section of the HE free books
* Update for free-programming-books-he.md
Removed the link to the "Java Guide" by Chaim Michael, the link is no longer available. Removed the section for Java so that there is no blank space there along with the Java listed in the Index.
* Update free-programming-books-he.md
Added a space as required by formatting
* removed stale links to AR books list
* cleaned up spacing
