Update to version 1.2

Changelog:

• Add pinstall, preinstall frontends to upgrade-ports script
• Use ellipsis '...' to indicate time consuming operations
• Clarify usage descriptions

upgrade-ports:

• backup self conflicting packages and use them to restore when upgrade fails
• allow to remove conflicting package in install phase
• show type of failure in upgrade summary when failed builds occur
• improve conflicts handling
• show removal reason in upgrade summary
• check rebuilt ports for BROKEN and IGNORE flags
• automatically change port name on move operation
• implement option for only checking packages database for errors (-c)
• improved MOVED entries tracking
• don't offer recompilation of packages linked to libraries not found by system linker

upgrade-base:

• force sudo to preserve already set environment variables, this fixes PORTS_MODULES not being passed when user is non-root

tbuilder:

• improve detection of required option for library dependency
• add profiles feature, it's files in $CONFIGDIR containing names of jails for use in one build test batch.

pcommit:

• print correct object type in file_add() function