LRDOCS-696 Updated information on setting the legacy password encryption algorithm when upgrading from Liferay 6.1 to Liferay 6.2
LRDOCS-696 Added note that the 6.2 default encryption algorithm is a stronger algorithm than the 6.1 default
LRDOCS-696 Updated and reorganized information on upgrading to Liferay 6.2 from previous versions
Merge branch 'LRDOCS-746' of github.com:jrao/liferay-docs into encryption
Wordsmithed, commented, and added diagram.