Updates examples because they are to wide
More tests and new helper

o Tests for get metadata
o New helper that detects working i-net connection
Adds new helper to get functions
Adds fixture and new test

o Adds eml file as fixture to test eml file read
o Adds new test that tests eml file read
Fix typo
Changes the package documentation

Because it is possible to use the package in combination with an own
BEFdata instance this note is necessary.
More tests for get metadata #34
New test for get dataset #34
Minor bugfix
changes email
Updates description
Merge branch 'v0.3'
refactor helper suggest_filename
Test for the right default options
Moves the tests and adds new options tests
Improves testing

o Adds new tests for get attachments #34
o Adds test helpers that can be sourced into test files
  to create certain conditions for testing.
small improvements on tests
Improved tests and helpers
Improves the eml template

o This includes now the new information about free formatted units
  from the attributeName field.
o This closes #23
Improves the eml template