The "set" or "clear" part of /sign {set,clear} <line> [<text>] is now optional because behavior can be inferred from <line>. (Fixes #1)
Fixed
Removed ambiguity from right-click instruction to player in clicking: true mode Before:§cNow right-click a block to set the line After:§cNow right-click a sign to set the line
Before a configuration file is written, it is now checked for sanity.
Possible crash if clicking config option is not properly set
Plugin errors out when running /sign {set,clear} <line> [<text>] and <line> is not an integer