README.md in fast_excel-0.1 vs README.md in fast_excel-0.1.1

@@ -1,21 +1,19 @@
 # Ultra Fast Excel Writter for Ruby
 
 ```ruby
-require 'fast_excel'
-
-workbook = FastExcel.open("hello_world_ffi.xlsx")
+workbook = FastExcel.open("hello_world_ffi.xlsx", constant_memory: true)
 worksheet = workbook.add_worksheet("Garuda Payments")
 
 bold = workbook.bold_cell_format
-worksheet.set_column(0, 0, 30, bold)
+worksheet.set_column(0, 0, FastExcel::DEF_COL_WIDTH, bold)
 
 price = workbook.number_format("#,##0.00")
-worksheet.set_column(1, 1, 30, price)
+worksheet.set_column(1, 1, 20, price)
 
 date_format = workbook.number_format("[$-409]m/d/yy h:mm AM/PM;@")
-worksheet.set_column(2, 2, 30, date_format)
+worksheet.set_column(2, 2, 20, date_format)
 
 worksheet.write_row(0, ["message", "price", "date"], bold)
 
 for i in 1..1000
   worksheet.write_row(i, ["Hello", (rand * 10_000_000).round(2), Time.now])
@@ -34,32 +32,6 @@
 end
 
 workbook.close
 ```
 
-
-# Build
-
-## On Mac
-
-    git clone https://github.com/jmcnamara/libxlsxwriter.git
-    cd libxlsxwriter
-    make
-    cd ..
-    cp libxlsxwriter/lib/libxlsxwriter.dylib ./binaries/libxlsxwriter-darwin.dylib
-    otool -L ./binaries/libxlsxwriter-darwin.dylib
-    #install_name_tool -change /usr/lib/libxlsxwriter.dylib @rpath/libxlsxwriter-darwin.dylib ./binaries/libxlsxwriter-darwin.dylib
-
-
-## On Linux
-
-    docker build . -f build_alpine_linux.docker -t fast_excel_alpine
-    docker run -t fast_excel_alpine ls lib/libxlsxwriter.so
-    LAST_CONTAINER_ID=$(docker ps -a | grep fast_excel_alpine | head -1 | awk '{print $1;}')
-    docker cp $LAST_CONTAINER_ID:/srv/libxlsxwriter/lib/libxlsxwriter.so ./binaries/libxlsxwriter-alpine.so
-    docker rm $LAST_CONTAINER_ID
-
-    docker build . -f build_centos_linux.docker -t fast_excel_centos
-    docker run -t fast_excel_centos ls lib/libxlsxwriter.so
-    LAST_CONTAINER_ID=$(docker ps -a | grep fast_excel_centos | head -1 | awk '{print $1;}')
-    docker cp $LAST_CONTAINER_ID:/srv/libxlsxwriter/lib/libxlsxwriter.so ./binaries/libxlsxwriter-glibc.so
-    docker rm $LAST_CONTAINER_ID
\ No newline at end of file
+This repositiry and gem contain precompiled `libxlsxwriter` for macOs, Linux  with glibc and Alpine Linux