MySQL connection dsn, charset support

 - added charset support for MySQL dsn string
 - added charset parameter to the phinx configuration
 - updated configuration documentation
Fix for PSR-2
fix driverOptions not working

driverOptions may not be array of array
Merge pull request #157 from ertko/patch-1

fix driverOptions not working
test for php 5.5!
Merge branch '0.2.x-dev' of github.com:robmorgan/phinx into 0.2.x-dev
adding scrutinizer support
add code coverage badge
escape underscores
corrected biginteger default value
Add support to column comments in the Postgres Adapter
Repairing tabulations spaces
Add a Phinx\Db\Table::addTimestamps() method.
This method automatically create two timestamp comlumns: created_at and updated_at.
Merge pull request #163 from felipedjinn/feature/41/table-add-timestamps

Add a Phinx\Db\Table::addTimestamps() method.
Merge pull request #161 from felipedjinn/feature/131/postgres-column-comments

Add support to column comments in the Postgres Adapter
Merge pull request #160 from dangerousdan/corrected_biginteger_default_limit

Corrected mysql biginteger default value
removing dbl space
merging PR. closes #141.
adding phpcs
fixing PSR2 issues. closes #147