consolidated minor revisions

programs

• allow for more than 5 dimensions, maybe 6-8
• add test for not entirely missing svy variables or non-zero sample
• bugfix: hardcoded weight variable in _mpitb_est._wmbygrp
• bugfix: _mpitb_est: call of rframe using local tvar may result in wrong option (must always be "t" or empty)
• add dummy text to reporting back if noestimate is specified
• mpitb set delete previous chars with replace option
• mpitb set add checks for dimension and indicator name length
• consider renaming levelframe() into lframe() and levelsave() into lsave()

documentation

• add remark on length of dimensions and variable names to documentation
• explain difference between indicators and dimensions (maybe as a remark)
• explain what "equal-nested" means

data

• remove data chars from synth files

certification scripts

• add general tests with alternative variable names. Overall run; ideally all programs; all variables