Declare php ext dependencies (bcmath and mbstring) in composer.json

Signed-off-by: Rogerio Prado de Jesus <rogeriopradoj@gmail.com>
Change the "require" for "suggest" extensions

Signed-off-by: Rogerio Prado de Jesus <rogeriopradoj@gmail.com>
Merge pull request #128 from rogeriopradoj/declare-php-ext-suggestions

Declare php ext suggestions, fix #121 PR#128 @rogeriopradoj
Update README.md

correct minor grammatical error
Merge pull request #135 from loganville/develop

Documentation grammar fix by @loganville
Merge pull request #130 from mta59066/develop

Test enhancements by @mta59066
Merge remote-tracking branch 'upstream/develop' into develop