fix errors ending with an exclamation point; use a point instead
remove uniques (or almost) error messages titles, like 'Encoding Error' (1 occurrence in addons), 'Integrity Error' (1 occurrence in addons), 'Report Name' (1 occurrence in addons), 'Value Error' (1 occurrence in addons), 'Wrong Period Code' (1 occurrence in addons); replace these with 'Error'
add newline character after some messages titles, when necessary
fix 'UserError': should be 'User Error'
remove spaces before exclamation marks
add capital letters to messages titles words (e.g.: 'Invalid action' becomes 'Invalid Action')
bzr revid: abo@openerp.com-20120807110616-u3nlnybtgaebro18
b0e8ae4c7d