0.11.4 release candiate to correct Doc fixes and C warnings flagged by CRAN in #21

[skyebend]

https://github.com/statnet/networkDynamic/issues/21

Todo (skye):

• rsiena function warnings from windevel
• update changelog
• run full package check
• release to CRAN

[codecov-commenter]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (7d10a45) 62.59% compared to head (f95c591) 62.59%.

:exclamation: Current head f95c591 differs from pull request most recent head edbcb91. Consider uploading reports for the commit edbcb91 to get more accurate results

Files	Patch %	Lines
src/wtedgetree.c	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #23 +/- ## ======================================= Coverage 62.59% 62.59% ======================================= Files 20 20 Lines 4008 4008 ======================================= Hits 2509 2509 Misses 1499 1499 ```

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