Updated roxygen documentation of S4 classes

Signed-off-by: Stefan Widgren <stefan.widgren@gmail.com>
Rename S4 class hex slots to sha

Signed-off-by: Stefan Widgren <stefan.widgren@gmail.com>
Update test cases

Signed-off-by: Stefan Widgren <stefan.widgren@gmail.com>
Rebuild documentation

Signed-off-by: Stefan Widgren <stefan.widgren@gmail.com>
Rename 'hex' to 'sha' in R methods

Signed-off-by: Stefan Widgren <stefan.widgren@gmail.com>
Rebuild documentation

Signed-off-by: Stefan Widgren <stefan.widgren@gmail.com>
Rename 'hex' to 'sha' in git2r C code

Signed-off-by: Stefan Widgren <stefan.widgren@gmail.com>
Rename 'hex' to 'sha' in test cases

Signed-off-by: Stefan Widgren <stefan.widgren@gmail.com>
Merge branch 'master' into rename-hex-to-sha

* R/S4_classes.r: Fix conflicts

Signed-off-by: Stefan Widgren <stefan.widgren@gmail.com>
Merge branch 'rename-hex-to-sha'