Check valid template file

Utf8chk (#85)

* utf8chk

* bump version to 0.19.1

Gnome 45 platform, CC and BCC

Gnome 45, fixes, improvements CC, BCC (#84)

* Gnome 45 platform, new ColumnView widget, regression fix

* reporting improvements

* fix encoding during template import

* bump to version 0.19.0

Fixes

0.18.2

testing and fixes (#82)

update appdata

0.18.1

0.18.1 appdata (#81)

regression fix and new features

fix mail sending regression
add variable subject
add variable attachment paths
add extra header fields

Sanity and stability part 2

0.17.0

UI and stability improvements, feedback pop-ups (#79)

Stability part 1

Sanityetc (#78)

* Jasmine part 1

* validation part 1

* improved tests, improved connections editing, minor fixes

* cleanup

* skipped line

* appdata

Results report

0.15.0

shows results report. can save report as csv file (#69)

Compressed files and save prompt

0.14.0

prompt to save on settings and contents screens (#68)

tighten sandbox, improve metadata

0.13.3

still tweaking the appdata...