Merge pull request #535 from hflynn/rebased/dev_4_4/mxcl_homebrew_link

Update homebrew git link (rebased onto dev_4_4)
Fixing broken source link
Merge pull request #540 from hflynn/rebased/dev_4_4/rebased/develop/11649

Adding JVM memory settings to main install docs (rebased onto develop) (rebased onto dev_4_4)
Add paragraph about Ice 3.5 server not supported under Windows
Add note about Windows Ice 3.5 clients
Improve description of Ice 3.5 limitation
Shorter lines, fix 'the' & 'center'
merge dev_4_4 -D org -I include -E exclude: PR 537 (Web settings removal 11559)
merge dev_4_4 -D org -I include -E exclude: PR 541 (Add paragraph about Ice 3.5 server not supported under Windows)