fix grammar and spelling in some places

Update itsy-bitsy-data-structures.js

Fixed typo. (#47)

Minor comment change in LinkedList section to ease understanding (#45)

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1.0.0

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Update itsy-bitsy-data-structures.js

LL should error out on empty list remove (#42)

Update itsy-bitsy-data-structures.js

throw when trying to get item out of list's range (#29)

Typo fixes (#30)

Typo fixes. (#26)

O(log N) calculations fixed (#24)

Fix typo and grammatical mistakes (#21)