- Re-roxygenize to fix HTML validation errors.

- Fixed C-level errors (#31)

This is a major overhaul of the package.

- The package now supports ‘sparse6’ and ‘digraph6’ formats.
- A more complete API with
`graph_as_text()`

,`igraph_from_text()`

,`network_from_text()`

top level functions and plethora low level functions. - Added vignette.
- David Schoch joins as a coauthor.

- Corrections in the documentation
- Added description of
`graph6`

format.

- Corrected code for binary to decimal conversion. Previous version was returning wrong results for binary numbers that begin with 1 and have all other entries to 0.
- Added some tests for testing binary to decimal conversions as well as for converting matrices to graph6 format.

- Added functions
`b2d`

and`d2b`

for conversions between decimal and binary numbers. They are based on compiled C code so should be much faster than the older ones written in R. - Functions
`bin2dec`

and`dec2bin`

have been rewritten for use of newly added compiled code. - Added a
`sampleg6`

file with couple of g6 symbols.

- First beta version of the package.