v0.3.0: Languorously Loquacious

• add -x, --exclusive to explicitly obtain an exclusive/write lock.
• add -E, --conflict-exit-code to override the default error code used for a conflicting lock or time‐out.
• add --verbose so as to noticeably increase the quantity of verbiage emitted during the operation of the tool, specifically command to be run, elapsed time.
• add long flag names