sysadmins: Merge server-install-linux into general server-installation section
server-installation: Drop leading ./ from bin paths
server-installation: Complete sentence
removing part about session engine on windows
adding comment about session engine removal
sysadmin: Capitalisation fixes
sysadmin: Reorder python installation instructions
sysadmin: Remove hardcoded Ice versions
sysadmin: Reword sentence
sysadmin: Consolidate warnings
sysadmin: Remove colon
sysadmin: Add missing space after comma
Reformatting& rewording Homebrew guide description
adding commands to unset session engine
Making Ubuntu section bullet point
Merge pull request #1 from hflynn/install-cleanup

Reformatting and rewording of Homebrew guide description
server-installation: Minor corrections
server-installation: Document unzip packages
server-installation: Replace source install instructions with reference
reformatting note box