Merge pull request #3 from maraoz/master

fix small typo
update "bitcore" to "Bitcore"

Bitcore should normally be capitalized like a proper noun.
tx builder article, not ready, WIP
update contents
update contents
fix errors
fix errors
fix errors
fix errors
Merge pull request #4 from matiu/feature/txbuilder

Feature/txbuilder
fix errors
fix errors
Merge pull request #5 from matiu/feature/txbuilder2

Feature/txbuilder2
update link to insight new url
new bitcore test data coverage post