fixes #2: auto-increment version numbers using -u switch
document all options
remove remark about version and date placeholders, obsolete as of #1
bugfix
helper functions for fatal exit
refactor: extract function
refactor: location of export directory is stored in variable
run R CMD check from .tar.gz instead of from directory, to avoid checking files like .gitignore; see http://stackoverflow.com/a/8887542/946850
fixes #5: read package name from DESCRIPTION file, allow calling rant from any directory or without parameters
bugfix
refactor: extract function
refactor: extract variable
work in package directory first, saves some path prefixes; prerequisite for #4
Merge pull request #3 from krlmlr/2-autoinc

Auto-increment version numbers
fixes #4: auto-commit changes unless -S is given; without -S, works only on clean working copy
try to respect 80-character limit
Merge branch '5-pkg-name' into 4-autocommit
-V switch is obsolete as of ca3b8667
Merge branch '5-pkg-name' into 4-autocommit
bugfix