Fixes #76 using `uname -m` to get system architecture
Low level API fof Oracle JDK installation and version checking
Added Oracle JDK to require API
Downloading JDK package with -O wget option to preserve filename after redirects (different wget behavior on Ubuntu and CentOS)
Updated documentation for install Oracle JDK function
JDK Installation exports JAVA_HOME to env and java binary to system path
Oracle JDK module documentation
PEP8 compliance
Organized imports
Using require.file instead of echo as root
Merge pull request #78 from kamilchm/oracle_jdk

Oracle JDK installation module