2.0.0

This release is a complete re-write of the Sibelius to MEI plugin. In addition to the fixes and features from the previous beta versions, this new release contains several more fixes:

• Fixed a spelling mistake on octava lines (5b753df)
• Fixed an issue where objects could be assigned to a non-existent layer 0 (1894073)
• Fixed an issue where ties may not be encoded correctly (5585af9)
• Fixed redundant encoding of staff and layer on notes (3f719c8) NB: See commit message for caveat
• Fixed an issue where grace notes could be counted as the last note of a tuplet (ff34e50)
• Fixed an issue where repeat signs could be missing (0fa1fdf)
• Fixed syllable connectors to encode the 'd' (dash) connector (93127c2)

(Apologies for the myriad release messages this evening... I decided to simply release the full version after releasing Beta 4...)