InterVA4 - changes

Version 1.7.6 (2018-11-11)

Fix output csv file format error

Version 1.7.5 (2018-02-19)

Fix error in extracting CSMF for pregnancy related death

Changes in version 1.7.4 (2017-05-26)

Update license to GPL-3
Add author Peter Byass

Changes in version 1.7.3 (2016-12-08)

Update the built-in conditional probability matrix to be consistent with the released InterVA-4.03 software.
The option replicate = FALSE now sets the implementation to be the same as InterVA-4.03, while the individual bug replicate options remain to be fixing the bugs based on InterVA-4.02.
The updated conditional probability and data check rules for InterVA-4.03 are summarized as follows:
- if sk_les = Yes don't ask sk_feet
- if sk_feet = Yes don't ask sk_les
- if ch_rash = Yes don't ask measrash
- if measrash = Yes don't ask herpes
- if measrash = Yes don't ask rash
- if herpes = Yes don't ask measrash
- if herpes = Yes don't ask rash
- prior CSMF for HIV/AIDS change from E to C (overwritten later, not effective)
- prior CSMF for Malaria change from E to C (overwritten later, not effective)