Remove caTools dependency

Instead, use base64 encoding function from httpuv
Bump version to 0.10.1
Merge pull request #552 from rstudio/no-catools

Remove caTools dependency
Merge tag 'v/0/10/1'

Shiny 0.10.1 released to CRAN
Bump to development version number
upgrade DataTables from 1.9.4 to 0.10.2; closes #487
fix a bug when the number of rows of data to show is zero

all(logical(0)) == TRUE!
tweaking the bootstrap style copied from DataTables:

1. sorted columns have different colors;
2. correct position of the processing info;
3. override the width of text input (search fields), otherwise they will be too wide (206px defined in bootstrap.min.css);
white space
the names of keys and values are useless
support [] in query strings like $_GET in PHP, because server-side DataTables 1.10 passes parameters as arrays

e.g. columns[0][search][value]=foo&columns[1][search][value]=bar

we need list(columns = list(`0` = list(search = list(value = 'foo')), `1` = ...)
new option names for DataTables from Hungarian to camelCase notations
tweak doc and roxygenize